But everything will change after the iOS14 privacy update. And even though Facebook Pixel is laying on a deathbed, there is an alternative that might be promising more results than you expect from it. Without further ado, let’s learn what CAPI is, why you have to use it and how to apply it for peak performance! A quick recap: why did Facebook rules change? Digital space hasn’t been at its best health in the past couple of years, so the regulatory system started intervening. The GDPR (General Data Protection Regulation) came into effect in 2018, which forced advertisers and website owners to notify users about the usage of cookies and tracking of the personal information about them.