Basically, A/B testing stops you from guessing.
Instead of just saying "I think this new feature will work," you prove it.
- Group A (Control): Uses the app as normal.
- Group B (Test): Gets the new "Cashback" feature.
If Group B stays longer than Group A, you win.
My biggest realization: You need that Control Group (Group A). If you give the bonus to everyone at once and sales go up, you won't know if it was because of the bonus or just because it was payday. Group A proves it wasn't luck.
Don't guess. Test.