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Hashtag - Instagram Glossary

A hashtag is a keyword prefixed with # that categorises a post. Hashtags are a relevance signal that helps Instagram classify content, not a distribution lever - their influence on reach is real but far smaller than most guides imply.

The mechanism is classification. Tags tell the system what a post is about, which affects who it gets tested on. That is why thirty unrelated tags actively hurt: they tell the system your fitness reel is also about travel and food, and a muddled signal produces conservative distribution.

Tier matters more than count. A tag with twelve million posts buries you within seconds; one with eight thousand can hold you in its top posts for a day. Small accounts get more from small tags, and a set weighted towards mid and niche outperforms a set of the biggest tags in the category.

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