Short version: A claim is a concise statement that expresses a brand promise, benefit, proof point, or point of view.
In branding and advertising, a claim can appear in a headline, campaign line, product message, website hero, packaging, or ad. It should make the audience understand what is being promised and why it matters. A claim is stronger when it is specific, relevant, and connected to a real difference or customer problem.
The risky version of a claim is an empty or unsupported superlative. Saying that something is the best, fastest, safest, or most effective creates expectations that may need evidence. Good claims stay memorable without becoming misleading. They should connect with the wider messaging system and be easy for the business to defend in real customer conversations.
Related terms: value proposition, messaging, and tagline.