Full Answer

Most businesses lose 20-40% of conversion data to three sources: ad blockers (affecting 31.5% of users), iOS App Tracking Transparency (up to 96% opt-out rates), and browser cookie restrictions like Safari's 7-day ITP limit. This invisible data loss directly degrades ad performance because algorithms optimize on incomplete information, misallocating budget toward the wrong audiences. On a $10,000/month ad budget, 30% signal loss typically translates to $1,500-3,000/month in wasted spend from suboptimal targeting and bidding.