L040 – KPI fundamentals (EN)

This lesson helps you understand what a KPI (Key Performance Indicator) is and how to choose ONE primary indicator to improve without confusion.

Goal

By the end you will have:

• 1 weekly primary KPI (per project or per phase)
• 1 connected action/test (one thing at a time)

Golden rule

Choose 1 KPI and run 1 test at a time. If you change everything together, you learn nothing.

Quick examples

Video (YouTube): CTR, average retention, returning viewers, subscribers.

Podcast: completion, follower growth, listens per episode.

Newsletter: open rate, click rate.

Next step

Link the KPI to your creative A/B (title+thumb) and to your outline (retention).