You've optimized all of your code, but your site still loads too slowly. Who's the culprit?
Often, performance problems slowing pages down are due to third-party scripts: ads, analytics, trackers, social-media buttons, and so on.
Third-party scripts provide a wide range of useful functionality, making the web more dynamic, interactive, and interconnected. These scripts may be crucial to your website's functionality or revenue stream. But third-party scripts also come with many risks that should be taken into consideration to minimize their impact while still providing value.
Why do you need to be
... read the whole story at developers.google.com.