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