Glossary of YouTube Terms

Key terms and definitions for YouTube creators.

Understanding YouTube terminology is essential for every creator. From watch time to CTR, RPM to monetization, the platform has its own language. This glossary defines the most important terms you will encounter on your YouTube growth journey. Use it as a reference while you explore our guides, tools, and campaigns.

Essential YouTube Terms

Watch Time

The total number of minutes viewers have spent watching your videos. Watch time is one of the most important ranking factors on YouTube. You need 4000 watch hours in the past 12 months to qualify for the Partner Program.

CTR (Click-Through Rate)

The percentage of people who click on your video after seeing the thumbnail and title. A higher CTR indicates that your content is appealing and relevant to your audience.

RPM (Revenue Per Mille)

The estimated earnings you receive for every 1000 views. RPM varies based on niche, audience location, and ad format. Use our RPM calculator to estimate your potential earnings.

Impressions

The number of times your video thumbnail and title are shown to viewers on YouTube. Impressions are the first step toward getting views.

Sub4Sub

A traditional practice where creators subscribe to each other's channels in exchange for a subscription back. Often lacks verification and can harm channel health. Compare with Sub2Sub.

OAuth

An authorization protocol that allows apps to access user accounts without requiring passwords. SUB2SUB no longer requires OAuth — it uses public channel verification instead, so your account stays secure without extra permissions.

YouTube Data API v3

The official API that allows developers to access YouTube data. SUB2SUB uses this API to verify watch time and subscriptions, ensuring authentic growth.