How to Fix Heavy Third-Party Scripts
Analytics, chat, and ad tags blocking the main thread and slowing pages.
Symptoms you'll see
Third-party scripts (analytics, chat, ads, A/B testing) compete for the main thread and network, often dominating page weight and delaying interactivity.
Why it happens
Unmanaged third-party scripts are a top cause of poor INP and wasted mobile bandwidth, and can crash Core Web Vitals scores.
Step-by-step fix
Audit with a third-party script manager, defer or async non-critical tags, use a tag manager with lazy loading, and remove unused vendors. Server-side tag where possible.
How SEO Surgeon catches it
Our engine flags pages with poor interactivity likely tied to third-party scripts and recommends deferral.
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