How to analyze a metric drop, where to start?

To analyze a drop in a metric, start with a systematic approach:

1. Check data correctness — ensure data is collected and processed without errors, no tracking failures.
2. Determine the time interval of the drop — when exactly the decline started, to narrow down the analysis.
3. Study external factors — changes in the product, marketing campaigns, seasonality, technical issues.
4. Segment users — see which user groups experienced a stronger decline.
5. Check related metrics — perhaps the drop in one metric is related to the growth of another.
6. Analyze product changes — new releases, bugs, UX/UI modifications.

This approach helps identify causes and take corrective actions.