Performance marketing is a strategy in which every initiative is geared toward a measurable outcome—inquiries, sales, or new leads—and is evaluated based on that outcome.
For example, this allows you to know how much a click costs, how many clicks lead to an inquiry, and what it costs to acquire a lead. Along this chain, the budget is reallocated to where it yields the best results. Where the budget runs out, the campaign is paused.
Typical channels for performance marketing are SEA ads and social ads, as they can be quickly measured and adjusted.