Most hashtag advice online is a fossil. It describes a version of social media that ended around 2020, when adding thirty tags to a post genuinely multiplied its reach. That mechanic is gone, and pretending otherwise wastes real effort.
What changed
Every major platform moved from a follow-graph feed to a recommendation feed. What you see is now decided mostly by predicted watch time, completion rate, replay behaviour, save rate and share rate — signals about how people respond to your post, not about how you labelled it. A tag cannot make a post interesting, so a tag cannot fix distribution.
What tags still do
Three things, all of them useful.
They classify. Before anyone has interacted with a new post, the system needs a guess about what it is and who might want it. Caption text, on-screen text, audio and tags all feed that guess. Good tags speed up the moment where the platform finds the right first audience.
They make you findable. Tag pages and tag search still exist and are still used, particularly on Instagram and Pinterest. Ranking on a small tag page produces a slow, steady trickle of the right people, and that trickle compounds across a back catalogue in a way a single viral post does not.
They organise. A branded or campaign tag gives you a permanent, filterable archive of everything you and your audience have posted about a thing. That is worth doing purely for your own operational sanity.
What this means practically
Stop optimising tags for reach and start optimising them for accuracy. The question is not "which tags are big" but "which tags describe this post so precisely that the people who see it will actually want it."
That reframing changes the whole workflow. You stop maintaining one universal block of thirty tags and start writing a handful per post. You stop chasing #viral and start using the specific vocabulary of your niche. You accept less reach in exchange for better-matched reach, which is the only kind that turns into followers.
A reasonable default
For most creators on most platforms: three to five tags that describe the specific content, two or three that describe the niche, and at most one broad tag. Rotate the specific ones every post. Audit the niche ones every couple of months. That is the entire strategy, and it beats almost everything more complicated.