What is Third-party scripts?
The short answer
Third-party scripts are code loaded from other companies, such as analytics, ads, chat widgets and embeds, and are among the most common causes of slow pages.
What people say: “tracking pixels”, “chat widgets”.
Third-party scripts, explained
Each one adds requests and main-thread work you do not control. Load only what earns its cost, and load it after the page is usable.
Questions people ask about Third-party scripts
What is Third-party scripts?
Third-party scripts are code loaded from other companies, such as analytics, ads, chat widgets and embeds, and are among the most common causes of slow pages.
Related terms
Page speed is how quickly a web page loads and becomes usable, measured by metrics like Largest Contentful Paint, Interaction to Next Paint and layout stability.
Interaction to Next PaintInteraction to Next Paint measures how quickly a page visibly responds after a tap, click or key press, across the whole visit; good is 200 milliseconds or less.
Cookie consentCookie consent is asking visitors' permission before setting non-essential cookies, such as analytics and advertising trackers, as privacy laws require in many regions.
Core Web VitalsCore Web Vitals are Google's three user-experience metrics: Largest Contentful Paint for loading, Interaction to Next Paint for responsiveness and Cumulative Layout Shift for visual stability.
Part of the Web Encyclopedia by Apex Flow Digital. Definitions are general knowledge, kept current, with no invented statistics.