Instagram & TikTok SEO: Are Hashtags Still Important in 2026?By Hannah

If you’ve been wondering whether hashtags still matter on social media in 2026, then you’re not alone. With Instagram and TikTok continuing to roll out major algorithm updates focused on searchability, keywords, and content quality, almost everybody has been asking the same thing: are hashtags dead?

To put it simply, hashtags still matter, but not in the way they used to. At the end of 2025, we saw a big change in how hashtags work. And now, in 2026, hashtags are probably no longer going to be considered the hero of your reach strategy. Instead, they’re part of the wider Instagram and TikTok SEO ecosystem, where they work alongside keywords, captions, and on-screen text to help the algorithm understand what your post is about and who it’s for.

In order to get you up to speed, here’s what’s changed, what still works, and how to use hashtags smartly across Instagram and TikTok.

The algorithm shift: Search-first content is here

Back in 2024, Instagram began prioritising keyword search, meaning posts are now indexed based on the language you use in your captions, the context of your content, and relevance rather than just hashtags. TikTok quickly followed suit, leaning heavily on video SEO signals like on-screen text, voice, and captions. It’s one of the reasons why so many individuals use TikTok as a search engine these days.

Instagram now indexes content based on:

• Caption keywords
• Content relevance
• User behaviour and interest signals

TikTok has gone even further, becoming a genuine search engine for Gen Z and younger millennials, with content ranked based on:

• Watch time and completion rate
• On-screen text
• Captions and keywords
• Audio and spoken words

In other words, the algorithm is no longer relying on hashtags to understand content, it’s analysing everything.

Recent insights across the industry consistently show that:

• Engagement signals have more impact than hashtags
• Keywords and context are now critical for discoverability
• Content quality and relevance outweigh metadata hacks

In short, the algorithm wants clear context, not clustered clutter.

Why hashtags still matter in 2026

Despite the algorithm updates, hashtags still have an important supporting role to play on both platforms. Here’s why they still add value:

• Content categorisation: Helping platforms quickly understand topic and niche
• Discovery support: Contributing to placement in relevant feeds and searches
• Community building: Especially for branded campaigns, UGC, and events
• Trend participation: Still helpful for joining conversations and challenges

So yes, hashtags are still important, just not in the same way they were five years ago.

Hashtags vs. keywords: Finding the new balance

Now let’s move onto the important bit. The real secret to growth in 2026, believe it or not, isn’t about choosing between hashtags or keywords, it’s about using both strategically.

Think of hashtags as labels that help algorithms categorise your content, and think of keywords as language that helps algorithms understand your content. Together, they create a powerful discoverability combo.

For Instagram:

• Use 3–5 relevant hashtags, ideally niche, branded, or campaign-specific.
• Focus your captions on keywords your audience searches for (e.g. “social media strategy for small businesses” instead of “#socialmedia”).
• Add hashtags naturally to the end of your caption, there’s no need to stuff them.

For TikTok:

• Include up to 5 hashtags (TikTok no longer allows more than 5) that combine trends, niche topics, and your brand.
• Align your hashtags with keywords in your captions and on-screen text.
• If you’re including a voiceover in your video, say your key phrase out loud. Fun fact: TikTok’s AI reads audio and speech for SEO indexing.

How to use hashtags the right way

In 2026, the smartest brands will be using hashtags with clear purpose and understanding.

Do this:

• Use a mix of trending, niche and branded hashtags.
• Research what your audience is actually following or searching for.
• Keep them relevant to your post content and caption keywords.
• Track which hashtags actually bring new engagement or views (TikTok shows you how your audience found your content).

Avoid this:

• Spamming irrelevant or overused hashtags (#love #instagood #trending).
• Copying the same hashtag set for every single post.
• Overloading your caption with too many tags.

To wrap things up, real discoverability on Instagram and TikTok lies in the power of SEO on social media. That means combining keywords, captions, and hashtags to make your content as clear and relevant as possible for both algorithms and audiences.

At Swwim, we can help brands understand their hashtag and keyword use, building smarter, search-friendly content that actually gets seen.

Want the bigger picture on why this shift is happening in the first place? Read our piece on why people are searching TikTok instead of Google.

Are you after some help evolving your social media SEO strategy? Get in touch and we’ll help make sure your content gets found.