Search tab ads Benchmarks 2021 is a report that analyzes the performance of Search tab campaigns, a new ad placement on the App Store's Search tab, since its introduction in May 2021. The report provides average Tap-Through Rate (TTR), Conversion Rate (CR), Cost per Tap (CPT), Cost per Acquisition (CPA), and Cost per Mille (CPM) for various categories, countries, and regions. The report aims to help mobile developers and marketers understand their campaigns' performance, identify areas for growth, and effectively reach their target audience.