SEO glossary · H

Hashtag

What is a Hashtag?

A hashtag is a word or phrase preceded by the # symbol, such as #LocalSEO, that groups posts about the same topic on social media. Clicking or searching for a hashtag shows other posts that use it.

Where hashtags are used

  • Instagram and TikTok: to help posts and videos get discovered.
  • X (Twitter) and Threads: to join conversations and follow events.
  • LinkedIn: to tag posts by professional topic.
  • YouTube: to add topic tags to videos.

How to use hashtags well

  • Use a few relevant hashtags rather than a long list; platforms now rely more on the content itself to decide who sees a post.
  • Mix broad tags with specific ones, such as a city or a niche.
  • Create a branded hashtag for campaigns and events, and check that it isn’t already used for something else.
  • Write multi-word hashtags in camel case, such as #SmallBusinessTips, so they are easier to read and screen readers read them correctly.

Measuring hashtags

Compare the reach and engagement of posts with different hashtags, and track how often others use your branded hashtag.

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