Every other tag is shared ground. A branded tag is yours — a permanent, filterable archive of everything you and your audience have said about your work. It is also the tag most often created badly and then abandoned.
What makes a branded tag work
It is short. People type it on phones. Every extra character loses users.
It is unambiguous. Search it first. If it already returns unrelated content, pick something else — you will never outrank an established meaning.
It reads correctly. Run-together words produce famous accidents. Read it aloud and have someone else read it before you commit.
It survives translation. If you have an international audience, check the phrase does not mean something unfortunate elsewhere.
Two tags, not one
Most brands need a pair. A brand tag — your name, essentially permanent, used on everything. And a campaign tag — specific to a launch, a season or a collaboration, deliberately temporary.
The brand tag builds a long archive. The campaign tag creates urgency and gives you a clean measurement boundary.
Seeding it
A branded tag with no posts on it looks abandoned, and nobody joins something abandoned. Before you ask anyone to use it, put twenty of your own posts on it. Then put it everywhere: your bio, your packaging, your email footer, your video end cards, your physical signage.
Asking directly works better than most people expect, but only with a reason. "Tag your setup with #ourtag and we will feature the best one each Friday" gets participation. "Use our hashtag!" does not.
Feature what you get
The mechanism that sustains a branded tag is reciprocity. People post to it because posts to it get seen. If you never feature user content, participation decays within weeks. A weekly repost slot is usually enough.
Trademark caution
Using another company's branded tag to promote competing products can create real legal exposure in several jurisdictions. Commentary and comparison are generally fine; passing off is not. If you are unsure, ask a lawyer rather than a marketing blog.