Letter U

UGC (user-generated content) is content created by clients themselves: reviews, unboxings, photos. Cheaper to produce and more credible.

Unit economics - calculating profit from one client or order: does the business converge if it is scaled up? It is considered before pouring the budget.

Upsell - sale of a more expensive version, cross-sell - additional sale of a related one. Cheapest revenue growth: the client has already purchased.

USP (unique selling proposition) is a specific reason to buy from you, which a competitor cannot copy or does not state.

UTM tags are parameters in the link (source, medium, campaign), by which analytics understand where the referral came from. The basis of fair attribution.