CPC – CPM Calculator Pro

CPM vs RPM vs CPC vs CTR: Differences, Formulas & When to Use Each (Simple Guide)

February 12, 2026 by A.J CPM

“Comparison graphic showing CPM vs RPM vs CPC vs CTR in a clean analytics dashboard style.”

Learn the real difference between CPM, RPM, CPC, and CTR—and how each metric affects publisher revenue. This guide explains the formulas, when to use each metric, and how to improve your results with practical examples and optimization tips.

Why Is My AdSense RPM Dropping?

February 12, 2026January 16, 2026 by A.J CPM

AdSense RPM drop showing declining revenue caused by lower advertiser demand and traffic quality changes

A sudden AdSense RPM drop can significantly impact website revenue, even when traffic remains stable. This article explains the real causes behind RPM decline, how long it typically lasts, and what publishers should do to recover earnings.