The Core Web Vitals are three measurements for evaluating the user experience of a website with a focus on the loading time: LCP (Largest Contentful Paint), FID (First Input Delay) and CLS (Cumulative Layout Shift).
If external scripts are integrated on the website, this can have a negative impact on the loading speed of the website content. This particularly affects the First Input Delay (FID) metric, i.e. the time until the user can interact with the page.
In order for etracker Analytics to collect data, the etracker code first initiates the loading of another script. This process can be synchronous or asynchronous. In synchronous mode, the actual content of the page is only loaded after the etracker code has been executed. In asynchronous mode scripts can be executed simultaneously. Thus, in asynchronous mode, etracker Analytics has no influence on the loading speed of the website content and other scripts and ensures top Core Web Vitals.