Hashtag
A hashtag is a word or phrase written after the # symbol that groups every post using it under one topic — and on X, enough of them at once can push that topic to trend.
A hashtag is any word or unbroken phrase placed directly after the # symbol — like #WorldCup or #TORQSports. Tapping it opens a live feed of every public post using the same tag, which turns a scattered conversation into one searchable, clickable topic. There are no spaces inside a hashtag; the tag ends at the first space or punctuation, which is why multi-word tags are joined together (#BlackFriday, not #Black Friday).
Hashtags are the raw material of trending. X counts posts by the exact tag, so when many accounts use the same hashtag inside a short window, the algorithm reads that concentrated, rising activity and can promote the tag onto the Twitter/X trend board. This is why campaigns rally everyone around one agreed spelling — split your audience across #TorqSports and #TORQ_Sports and you split the count, and neither version climbs.
A few things make a hashtag work harder for trending:
- One canonical spelling — every variant fragments the volume.
- Short and typo-proof — easy to type means more people get it right.
- Genuinely used, not just displayed — the algorithm rewards many real accounts posting it, not one account repeating it.
A concrete example: #TORQSports became a single rallying tag that real accounts posted in a coordinated window, and it trended organically across seven countries. For a step-by-step, see how to create a hashtag on Twitter/X.