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This metric assumes that the largest object visible in the window is the primary content and penalizes invasive content such as very large titles, huge opening images, videos, banner ads, and pop-ups. In the two examples below, the largest element identified are the two main images. Example of Largest Contentful PaintExample of Largest Contentful Paint To provide a good user experience, sites should load content "above the fold" within the first 2.5 seconds and are considered slow above 4 seconds. Note that it is not the download time that is taken into account but the amount of space that the object uses in the user's window. If elements are rendered both above and below the page boundary, only the visible part is considered relevant.
The same goes for scaled elements. An 800x800 pixel icon when reduced to 50x50 pixels only counts for 50 pixels. is relevant. Therefore, as a general rule, it is important not to place "above the fold" videos or images larger than 250 pixels wide. Images of 300 pixels or Canada WhatsApp Number Data advertising banners of 336×280 or 300×250 already entail a significant penalty. First Input Delay (FID) Core Web Vitals: First Input DelayCore Web Vitals: First Input Delay First Input Delay is the time between a user's first interaction with a site page (such as clicking a link, button, or any JavaScript listener) and when the browser actually responds to that interaction.
Measures interactivity by how long the browser takes to respond to user input . Other interactions, such as scrolling and zooming, are continuous actions and are not considered. Google only considers the first input delay because it will be the initial signal that the user will have about the responsiveness of the site and will be fundamental in shaping the general impression of the quality and reliability of navigation. Today the main interactivity problems on a website occur during page loading because the code is split into multiple loads or too much JavaScript is loaded early.
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