For advertisers and publishers
Advertising Terms Guides
Plain-English explanations of CPM, CPC, CPA, ROAS, EPC, offerwalls, and more.
Advertising terms
What Is an Offerwall? How It Works in 2026
How offerwalls work for users, advertisers, and publishers, which offers they show, and what separates a trustworthy offerwall from a bad one.
Advertising terms
Tier 1, 2 and 3 Countries Explained: The 2026 List
What Tier 1, Tier 2, and Tier 3 countries mean in advertising, a common 2026 list, what changes from tier to tier, and how to choose countries for a worldwide campaign.
Advertising terms
What Is a Postback URL? S2S Tracking Explained
How server-to-server postbacks report conversions, which macros they carry, how to secure them with a signature, and how to fix the most common postback problems.
Advertising terms
What Is CPI? Cost Per Install Explained
What cost per install means, how to calculate it, what moves the price, how CPI compares with CPA and CPE, and how to find the most you can afford to pay per install.
Advertising terms
Advertising Glossary: 55 Terms Explained Simply
CPM, CPC, CPA, CPI, CTR, ROAS, EPC, postbacks, offerwalls, and more: the advertising terms you meet every day, explained in plain English.
Advertising terms
What Is ROAS? Formula, Examples, and Good Targets
How to calculate return on ad spend, how it differs from ROI, how to find your break-even ROAS, and how pay-per-result pricing makes it predictable.
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