A unique selling proposition is a specific benefit a buyer can distinguish from competing offers. The task is to choose a meaningful difference, not merely a more colorful slogan.
Put competing claims side by side and remove statements anyone could make. The demo leaves one concrete promise that the product could actually support.
Unique need not mean legally exclusive. Test whether the difference matters and can be demonstrated.
When to use
Use when choosing a provable difference for an ad headline or sales offer.