Instagram and TikTok SEO: captions, hashtags and keywords in 2026

Instagram SEO and TikTok SEO come down to one idea that both platforms now state openly: in search, relevance to the words someone typed matters more than how popular your video is. TikTok's help center says that for search, how well content matches the term entered is generally weighted more heavily than other signals. Instagram's search system card says it compares the words in a search with the words in your username, profile name and the results themselves. So the job is to say, clearly and in plain words, what your video is about, in every place the app can read it.

That means the words spoken in the video, the text on screen, the caption, the cover and your profile name. It does not mean a wall of hashtags. Instagram capped posts at 5 hashtags in December 2025, and Adam Mosseri has said more than once that hashtags do not significantly increase reach. TikTok's Creator Academy lists "a long list of hashtags will help your video rank higher in Search" as a myth and warns that stuffing keywords can get a video flagged for spam.

This guide covers how search works on each app as of November 2026, where to put keywords, how to find the words people actually search, how many hashtags to use, how Google indexes public Reels, the analytics that show your search traffic, and a repeatable keyword workflow for every video.

Why search matters on short-form apps now

People do search on these apps, though the headline numbers are often stretched. Adobe's 2026 survey of 807 US consumers (collected January to February 2026) found 49% had used TikTok as a search engine, up from 41% in 2024; the same survey found 89% of Gen Z still prefer Google, so TikTok is a second search engine, not a replacement. Video tutorials were what people most wanted when searching TikTok (61%), then product reviews (45%) and personal stories (41%).

Pew Research's survey of 5,166 US adults in August 2026 found 20% regularly get news on TikTok, and 39% of 18 to 29 year olds. And the line most often quoted, Google's Prabhakar Raghavan saying in July 2022 that almost 40% of young people look for lunch spots on TikTok or Instagram rather than Google Maps, came from an internal Google survey whose sample was never published. Treat it as a direction, not a statistic.

Why this matters for growth: a feed recommendation lasts days, but a search result can keep sending viewers for months. Tutorials, explainers, reviews and "how does X work" videos are exactly the formats people search for. If you make faceless explainers, search is one of your best sources of steady views, alongside the feed signals covered in how the TikTok algorithm works and how the Instagram algorithm works.

How TikTok search ranks videos

TikTok's support page on recommendations separates the For You feed from Search. For the feed, user interactions such as watch time weigh most. For search, "content information, which may include how well the content matches the specific term entered, is generally weighted more heavily than others." The search signals it names are how well the content matches the query, hashtags and the sound used.

Creator Academy goes further. Its search article says Search "values relevance over video views and engagement", names two levers (how relevant the content is to the search, and how high-quality the video is), and says "Your video titles and covers should clearly showcase your topic." It also warns that "irrelevant text stacking will actually negatively affect your video traffic."

One more practical point: TikTok says the tool you edit with does not matter for search. You can cut in CapCut, Premiere, Edits or render the whole thing in code; search performance is unaffected.

How Instagram search ranks posts and accounts

Instagram's Search system card (updated 23 June 2026) describes text matching against usernames, profile names, hashtags and the results themselves, including "the similarity between the words used in your search and those in the account's username or profile name." In other words, your profile name field is a ranking surface. "Maya | Money explained" can be found for "money explained"; "Maya" alone cannot.

The feed and Explore cards also matter for search-style content. The Feed Recommendations card, for posts from accounts you do not follow, lists "How informative a post is" as its first prediction, and the Feed card names informative content such as news, product reviews, tutorials and how-tos as a signal. Clear, useful, specific posts are the ones both search and recommendations are built to surface.

Instagram's older creator guidance said to "Include relevant keywords in captions, bio, and hashtags" so people can find you. That advice still matches how the current search card describes ranking.

Google now indexes public Reels from professional accounts

Instagram SEO now reaches beyond the app. Instagram's help center says it lets search engines index "photos and videos from public reels and posts that were uploaded or posted from January 1, 2020 onwards", when the account holder is "currently over 18", the account is "currently public" and it is "currently a professional account". Third-party reports date the change to July 2025; we found no official page giving the date.

Practically, your caption's first line and the words in the Reel can now help a Reel appear in Google and Bing, the same way a YouTube description does. Write the opening of the caption as a plain description someone could read in a search result. If you do not want this, you can opt out in privacy settings, switch to a personal account or go private, and Instagram notes de-indexing "may take time".

Where keywords belong, in order of weight

TikTok's Creator Academy sums it up: use "your video's description, voiceovers, captions, and on-screen text to make it clear just what your video's all about". Say it, show it, write it, with the same words.

Hashtags on Instagram in 2026: up to 5, and not a reach lever

Instagram's help center now reads: "You can use up to 5 tags on a post. If you include more than 5 tags on a single photo/video, your comment won't post." Instagram reported the cap in December 2025, with the advice that fewer, more targeted hashtags beat many generic ones. If an old guide tells you to use 20 or 30, it predates the cap; Later's study that found 20 to 30 hashtags performed best (18.1 million feed posts, no Reels) is now superseded.

Mosseri's line, reported in early 2025: hashtags "are no longer a primary way to increase your reach on Instagram." Metricool's 2026 study of 24.36 million posts found posts with at least one hashtag got 31.7% fewer views than average. That is a correlation, not a test (accounts that rely on hashtags may simply be weaker accounts), but it is another reason not to expect hashtags to rescue a Reel. Instagram's own creator FAQ does say relevant trending hashtags can help a reel reach more people, so the honest summary is: a few accurate tags can help categorise a post; piling them on does nothing.

Small experiments point the same way. Hootsuite's 2022 test on a personal account (10 posts) found keyword captions reached about 30% more people than hashtag captions; its 2021 test (20 posts) found 3 to 5 hashtags reached slightly more than 30. Both are tiny samples, so read them as illustrations.

Hashtags on TikTok: a myth with a spam risk

TikTok's Creator Academy addresses this directly. "Using a long list of hashtags will help your video rank higher in Search. Not quite!" It adds that "Overloading your caption with loosely related keywords or hashtags can actually work against you." The same article calls hidden keyword text a myth: "Adding a series of keywords to videos as on-screen text, making the text small, and swiping the text off-screen will boost your video in Search. This is most definitely a myth!" It can get a video flagged for spam.

Hashtags are still one of the video information signals TikTok names, so use them as labels: two to four that describe the topic precisely (#compoundinterest, #personalfinancetips) rather than broad ones (#fyp, #viral) that describe nothing. We found no Buffer, Later or Metricool study measuring TikTok hashtag counts, so there is no reliable number beyond TikTok's own warning against long lists.

How to find the words people actually search

On TikTok the best source is TikTok itself. Creator Search Insights shows what people search for and where content is missing. Open it by tapping Search, searching "Creator Search Insights" and tapping View. The "Content gap" filter shows topics with search demand and too few good videos; "Searches by followers" shows what your own audience searches, and needs more than 1,000 followers. TikTok notes some topics are AI-generated and not always accurate.

Creator Search Insights is available in 22 countries as of November 2026, including the US, Canada, UK, Ireland, Australia, Indonesia, the Philippines, Japan, Germany, Brazil, France and South Korea. India is not on the list (TikTok is banned there). Everywhere else, use the three manual methods below, which also work on Instagram.

• Search autocomplete: type the start of your topic into the app's search bar and write down every suggestion. Do this on both apps; they differ.
• Related searches: the "Others searched for" and suggested terms on TikTok results pages, and suggested accounts and keywords on Instagram's search results.
• Comments: the questions people ask under videos in your niche are search queries waiting to be answered. Copy their exact wording.
• Google: if a question has a "People also ask" box, it is a question people type. Since public Reels are indexed, the same phrase can win in both places.

Formats people search for (and that suit faceless video)

Adobe's 2026 survey points at what searchers want: tutorials first, then reviews, then personal stories. Not every format has search demand. A relatable skit is made for the feed; nobody types it into a search bar. These formats are built around a question someone could type, and most of them work without a face, which is why they suit the pages described in our guides to a faceless TikTok account and a faceless Instagram page.

• "X explained in 30 seconds": one concept, one example, one diagram. Matches "what is X" and "X explained" searches.
• "How to" steps: a numbered process shown on screen. Matches "how to X" searches and gets saved.
• "X vs Y": a side by side comparison with a clear verdict. Matches comparison searches, which carry buying intent.
• "Why does X happen": a mechanism shown with a drawing or chart. Matches curiosity searches and is easy to illustrate in code.
• "Mistakes when X": a list of errors with the fix for each. Matches beginner searches.
• "Best X for Y": a reviewed shortlist. Only if you have actually tried what you recommend, since reviews are where trust is lost fastest.

Each of these can become a series with the same opening phrase, which helps both search (one consistent phrase) and following (people know what the next episode will be).

A worked example: one topic, both apps

Suppose your page explains personal finance for beginners in India, so your platforms are Instagram and YouTube Shorts (TikTok is not available there). Autocomplete for "SIP" on Instagram suggests phrases such as "SIP for beginners" and "SIP vs FD". Comments under similar Reels keep asking how much a small monthly amount grows. You pick the question "How much does ₹1,000 a month grow in a SIP?"

The script opens: "How much does ₹1,000 a month become in a SIP? Here is the honest math." The hook text on screen reads "₹1,000 a month SIP: the math". The cover says "₹1,000/month SIP" in large type, centred so the 3:4 grid crop keeps it. Caption line one repeats the question as a sentence; line two promises the year-by-year number; then "Save this before you start"; then three tags. The profile name already reads "Name | Money explained simply".

If the same creator lived in the US and also posted to TikTok, the only extra step is checking Creator Search Insights > Content gap for the topic, and reading the Search queries panel a week later to see the real phrases people used. Those phrases become the next three videos. Post the same clean render to each app, without another platform's watermark; our Reels vs TikTok vs Shorts guide covers cross-posting safely.

Writing a caption that ranks and still reads well

The caption has two jobs: tell the search system what the video is about, and give a human a reason to watch or save it. The first line does both. Keep it a plain sentence that contains the main phrase, then add one or two lines of context, then a question or a save prompt, then a few hashtags.

Template: a search-friendly caption

LINE 1  The phrase, as a sentence a person would say:
        "Compound interest explained with one ₹1,000 example."
LINE 2  The specific promise or detail:
        "Why year 20 earns more than years 1 to 10 combined."
LINE 3  A real question or save prompt (not bait):
        "Save this for when you open your first SIP."
TAGS    2 to 4 specific tags: #compoundinterest #personalfinance
        #investingforbeginners

What to avoid: captions that are only hashtags, a first line of emojis, keyword lists, and long captions unrelated to the video. Instagram's Recommendations Guidelines list "Long captions unrelated to the underlying content" among low-quality content it will not recommend.

Say it and show it: spoken and on-screen keywords

TikTok names voiceovers and on-screen text as places it reads. Build that into the script rather than adding it at the end. The first spoken sentence should contain the phrase someone would search, and the hook text on screen should say the same thing. This also helps the many viewers who start muted, and it fits the hook structures in our guide to hooks for Reels and TikTok.

Example. Weak opening: "So today I want to talk about something that changed how I think about money." Searchable opening: "Compound interest explained in 30 seconds, with one example." The second loses nothing as a hook and matches what people type. Keep the on-screen text large and inside the safe zone so it is not hidden by the caption and buttons; our safe zones and specs guide has the exact areas.

Covers and titles

TikTok's Creator Academy says your titles and covers "should clearly showcase your topic". On search results pages, the cover is what people choose from, so it acts like a YouTube thumbnail: large words naming the topic, readable at a small size.

On Instagram, the profile grid has used a 3:4 crop since January 2025, so a cover designed for 9:16 gets its top and bottom trimmed in the grid. Keep the cover's words in the middle of the frame. Instagram's help center still quotes an older 420 by 654 cover size, which predates the 3:4 grid; design for the 3:4 centre and you are covered on both.

Your profile is a search result too

Both apps let people search accounts as well as videos, and on Instagram the search card names the username and profile name as matching fields. Three changes take five minutes:

• Profile name: add your subject after your name or brand, for example "Ledger | Money explained simply".
• Bio: one plain sentence on what the page posts and for whom. Avoid emoji-only bios.
• Highlights or pinned videos: pin the three videos that best answer your niche's biggest questions, so a searcher who lands on your profile sees the promise kept.

Where to see your search traffic

TikTok shows search traffic directly. Open Profile > menu > TikTok Studio > Analytics, open a video, and check Traffic source (the share from Search) and Search queries (the terms that led people to it). Creator Search Insights adds search analytics: search views, search view percentage, search impressions, average click-through rate and search ranking. TikTok notes analytics can take 1 to 2 days to update.

Instagram is less detailed. Reel insights show views, reach, sends, saves, skip rate and a retention chart, split by followers and non-followers, but Instagram does not publish a per-reel search query report. Watch your non-follower reach on tutorial and explainer Reels over weeks: steady views long after posting usually means search or recommendations are still sending people.

A keyword workflow for every video

Checklist: search workflow per video

1. Pick one question your audience asks (comments, autocomplete,
   Creator Search Insights > Content gap).
2. Write the main phrase exactly as people type it.
3. Script: phrase in the first spoken sentence; answer it fully.
4. Hook text on screen: same phrase, large, inside the safe zone.
5. Cover: 2 to 5 words naming the topic, centred for the 3:4 grid.
6. Caption line 1: the phrase as a sentence. Line 2: the promise.
7. 2 to 4 specific hashtags (never more than 5 on Instagram).
8. After 7 days: TikTok Studio > video > Traffic source and
   Search queries. Note the real queries; use them next time.
9. After 30 days: does the video still get views? Search-friendly
   topics should. Make a follow-up for the best query.

Common Instagram SEO and TikTok SEO mistakes

• Keyword stuffing in captions or as tiny or hidden on-screen text. TikTok calls this a myth that can get a video flagged for spam.
• Thirty hashtags. Instagram allows 5 now, and neither app treats more tags as more reach.
• Clever but vague titles. "This changed everything" ranks for nothing; "Compound interest explained" ranks for something people search.
• Misleading keywords. Ranking for a term you do not answer gets a fast swipe, and YouTube's spam policy explicitly bans misleading metadata; the logic carries to the other apps.
• Ignoring the profile name field on Instagram, which the search card names as a matching field.
• Changing topic every video. Search and recommendations both learn faster from an account with a clear subject. Our faceless Instagram page guide covers picking one.

Troubleshooting: my videos get no search traffic

First check eligibility, not keywords. On TikTok, run Account check (TikTok Studio > More tools > Account check), which scans your last 30 posts for issues including posts not eligible for the feed; TikTok also says ineligible content may be harder to find in search. On Instagram, open Account Status from your profile settings to see whether your content can be recommended. If both are clear, the usual causes are a topic nobody searches (check autocomplete), a phrase that does not match how people type it, or a video that does not answer the question, which shows up as a steep early drop in the retention chart.

Then give it time. Search traffic builds slowly, and a video that gets few views in its first day can still pick up searches for months. Judge search performance at 30 days, not 24 hours. For timing questions in general, see our best time to post on Instagram and TikTok guide.

Making search-friendly videos faster

The structure above (state the question, answer it clearly, show the words on screen) is how our Video Studio builds every video. You give it a topic, and it writes the script with the topic in the opening line, draws every frame as code, voices it and burns captions into the safe zone, producing a finished vertical Reel, TikTok or Short in about 3 minutes. Kinetic type, Ink stickman and Diagram explainer are the styles live today. You still write the caption and pick hashtags yourself, and you can browse the free tools for titles and hooks.

Auto-posting to YouTube is live for testers; Instagram and TikTok posting is coming, so for now you download the MP4 and post it. Plans are $19, $49 and $99 a month; you get 10 free credits at signup, enough to try the script tools but not a full Short, and a 30 second video costs 26 to 30 credits.