How to avoid page performance degradation caused by third-party advertising scripts?

When third-party ad scripts are loaded without optimization, they often cause page load delays, high CPU usage, or layout shifts. Performance degradation can be avoided through methods such as asynchronous loading and resource priority management. Asynchronous loading: Use the async or defer attribute to load ad scripts to avoid blocking HTML parsing and ensure that core page content is rendered first. Lazy loading: Apply lazy loading technology to ads outside the viewport, triggering loading only when the user scrolls to the ad's visible area to reduce initially loaded resources. Resource reduction: Require ad providers to compress script files and remove redundant code; regularly audit and deactivate low-conversion or duplicate ad scripts to reduce resource requests. Priority control: Preconnect to ad servers via preload or preconnect, optimize the loading order of critical scripts, and prevent unnecessary scripts from seizing bandwidth. Daily monitoring of the impact of ad scripts on performance can be done through Lighthouse or PageSpeed Insights. Prioritize handling scripts with loading times exceeding 300ms to balance ad revenue and user experience.