How much data do I lose with client-side tracking only?

data loss client-side ad blockers ios safari attribution

Quick Answer

30-40% of conversion data typically lost. 31.5% of users globally run ad blockers. Safari/iOS limits cookies to 7 days (24 hours for some). Browser privacy features block third-party scripts. Missing conversions train algorithms wrong, causing poor targeting and wasted ad spend.

Full Answer

Client-side tracking faces multiple data loss vectors: ad blockers (31.5% of users), Safari ITP limiting cookies, iOS App Tracking Transparency, browser privacy modes, network timeouts, and page abandonment before scripts load. For a $10K/month ad spend, 30% data loss means approximately $3K wasted monthly on misattribution. Platforms optimize on incomplete data, overspending on channels with better tracking rather than better performance.