USP stands for Unique Selling Proposition. It is also known as Unique Selling Point. It is a new concept of marketing to differentiate your product from the rest competitors.
The all three words in "Unique Selling Proposition" can be described individually.
Unique: Choose an absolutely different approach of Marketing.
Unique:Selling: Exchanging money for service or product.
Selling:Proposition: Providing an offer or a proposal to buy something.
Proposition:Now a day, in this very competitive environment, it is a USP of a company that differentiate it from others.
You know that Domino Pizzas is offering hot pizza delivered to your home in less than 30 minutes, if the company doesn't keep its promise, it gives you the pizza - free of cost. It is called Unique Selling Proposition. This is the strategy of Domino's pizza that attracts customers by making their sales proposition unique.
Some good example of products with a clear USP in the market:
Head & Shoulders: "You get rid of dandruff".
Head & Shoulders:M&M's: "Melts in your mouth, not in your hand".
M&M's:Metropolitan Life: "Get Met. It Pays." Etc.
Metropolitan Life: