Ads, analytics, and social widgets can seriously hurt the performance of your site. If you have dozens (or more!) third parties on a page, it can be tricky to figure out which one is the source of your pain. Image: Freepik In this article, we’ll explain how to: Audit the third parties on your pages Understand third-party performance metrics Prevent regressions Make your third-party providers accountable Some interesting (and scary) facts about third-party scripts: The average web page has 35+ third-party scripts.