What is unique selling proposition?

A unique selling proposition (USP) is the single, specific claim that makes your product the obvious choice for a particular buyer — something valuable to them that competitors cannot or do not offer. “The only X that does Y” is the classic template.

A strong USP is narrow and verifiable, not a slogan. It comes from real competitor analysis: you can only claim a difference confidently when you know what every alternative in your competitive landscape actually offers.