Revenue
This is the income generated by a company, usually measured across a set time period.
Return on ad spend (ROAS)
ROAS is the overall return on the amount spent on ads.
Return on Investment (ROI)
ROI is the overall return on an investment for a campaign or marketing channel.
Retention
This is the percentage of users who are still active in an App after a defined period of time.
Real-time bidding
Real-time bidding refers to the practice of buying and selling ads in real time on a per-impression basis in an instant auction.