Reduced Data Loss: CAPI reduces the risk of data loss due to browser issues, ad blockers, or user settings.

Custom Domain Setup: A custom domain in server-side tracking helps to collect cookies by making the cookies first-party cookies. First-party cookies are cookies that are set by the domain that the user is visiting. They are not blocked by ad blockers or    some browsers like Firefox, Safari, Brave, Opera, and Iso14 Without setup Custom Domain you can not track this user

Target ads more effectively: First-party cookies can be used to target ads more effectively by showing ads to users who are more likely to be interested in them. For example, you could use first-party cookies to show ads to users who have visited certain pages on your website or who have added certain products to their cart.