An attribution window is the number of days between when a person viewed or clicked your Facebook ad and subsequently took an action.
Facebook uses an ad auction to determine the best ad to show to a person at a given point in time. The winner of the auction is the ad with the highest total value, based on bid, estimated action rates, and ad quality.
Audience Insights is a tool that helps you learn more about an audience compared to the general Facebook population.
Breakdown is a way to get insights into your ad performance related to time, delivery, action, or dynamic creative element.
A budget is an amount you’re willing to spend on your Facebook campaigns or ad sets on a daily or lifetime basis.