How much does ROAS improve with server-side tracking?

roas improvement conversions cpa algorithm performance

Quick Answer

10-30% more conversions captured and reported to platforms. Facebook CAPI case studies show 13-25% attribution improvement. Better data means better algorithm training, which means improved targeting and 10-25% CPA reduction. Complete data vs incomplete data shows 15-30% ROAS difference.

Full Answer

Server-side tracking improves ROAS through two mechanisms: (1) Capturing conversions that client-side misses (30-40% data loss recovered), so platforms see your true performance; (2) Sending enriched data (hashed emails, customer IDs) that improves match rates and closes cross-device attribution gaps. When Facebook/Google algorithms train on complete data instead of 60-70% of events, they find better audiences and optimize more effectively.