SEO on Social Media

If I were starting fresh on this topic today, I would pick one platform — say Instagram or YouTube — and get the profile page right first. I have seen a neglected bio with no location or website URL lose me local search visibility. The research is clear: complete profile fields (username, name, bio, location, website) improve findability both inside the platform and on Google for public profiles. I would use the primary keyword in the bio naturally, not stuffed. For a travel photographer, that might be “London-based travel photographer capturing urban landscapes” rather than “travel photographer London urban landscapes photography”. The difference feels small but the first reads like a person.

The second step I take is writing captions and titles with the same discipline I use for [blogs](/blogs/). I open with a sentence that contains the main keyword, then support it with relevant context. A recipe video caption should start “How to make Thai green curry in 20 minutes” not “Here's a quick recipe I tried last night”. I also add subtitles or on-screen text to video posts because platforms like YouTube and TikTok transcribe speech for indexing. I make sure to say the keyword aloud in the first few seconds.

Third, I choose hashtags deliberately. I have tested 30 hashtags on Instagram and got worse reach than 5 specific ones. I now pick a mix of broad and niche tags, all directly related to the post. For a post about [on-page SEO](/on-page-seo/), I might use #onpageseo, #seotips, and #technicalseo — not #marketing or #digital. The platform’s algorithm seems to weigh relevance more than volume now.

Finally, I schedule time to analyse which posts perform in-platform search. I check which queries my profile shows up for and adjust. I also repurpose content that already ranks on my site, such as turning a high-traffic [blog post](/seo-blog/) into a short video or carousel. This closes the loop between web SEO and social SEO.

The biggest trap I have seen peers fall into is treating social SEO like a keyword-density exercise. You cannot stuff your bio with 20 keywords and expect it to rank. Platforms like Instagram and X use natural language signals; an overly optimised bio feels spammy and may even get suppressed. Keep it readable first, keyword-rich second.

Another watch-out is ignoring engagement metrics. Social platforms are not crawlers — they recommend content based on how people interact with it. A post with high watch time, saves, and shares will outrank a technically optimised post that nobody engages with. I have seen this firsthand: a video with a weak title but strong retention beat my carefully keyworded version. So I now spend time on hooks and pacing, not just the metadata.

Beware of platform-specific quirks. YouTube indexes the video title, description, and closed captions, but not every platform uses the same signals. Pinterest relies on pin descriptions and board names. TikTok's search uses caption text and on-screen text. A tactic that works on one may flop on another. I keep a simple spreadsheet mapping each platform’s key optimisation fields.

Also, linking is tricky. Most social links are nofollow and do not pass link equity to your site. But they still drive referral traffic and branded search queries, which indirectly support your web SEO. I link to specific [landing pages](/what-is-a-landing-page/) or [blog posts](/seo-content-strategy/) rather than just the homepage, and I track clicks via UTM parameters. Do not expect a direct ranking boost from social links, but do expect more visits and brand searches.

Finally, remember that social profiles are often public and can appear in Google results. A poorly optimised profile with no bio or an out-of-date website URL can harm your overall search presence. I update mine quarterly, and I also audit the [meta descriptions](/meta-description/) on pages I link to from social, since those snippets appear in shared link previews.

I used to think social SEO was a separate discipline that didn't affect my real work. I would write a blog post, publish it, and maybe throw a link on Twitter. I treated the social piece as distribution, not optimisation. That was a mistake. Social platforms are search engines in their own right, and many users start their journey there. I now see social SEO as an extension of [on-page optimisation](/onpage-seo/).

Early on, I also ignored the power of captions and subtitles. A year ago, I made YouTube videos without transcripts, relying only on the title and description. My views were flat. When I started uploading captions and manually adding timestamps, my videos began appearing in search results for phrases I had only spoken. I had the content, but I wasn't making it searchable. Now I always generate a transcript and add it as a caption file.

Another wrong turn was hashtag quantity. I read advice to use all 30 Instagram hashtags, so I did. But my reach dropped because the algorithm saw many of those tags as irrelevant. I pulled back to 4-6 tightly related hashtags and saw better engagement and discovery. I was using hashtags as a blunt instrument when I should have been using them as a scalpel.

I also misunderstood the relationship between social engagement and Google rankings. I thought shares and likes might be a direct ranking factor. They are not. But social signals can increase brand searches, which in turn correlates with higher rankings. I was chasing likes for vanity rather than focusing on getting people to search for my brand name. That shift in focus — from engagement to search demand — changed how I measure success.

Finally, I neglected alt text on social images for years. Platforms like X and LinkedIn support alt text, and it helps with both accessibility and image search within the platform. Now I always add descriptive alt text to every image I post, including keywords where natural. It takes ten seconds and adds a layer of discoverability I previously ignored.