Largest Contentful Paint

Definition: One of the three core web vitals, Largest Contentful Paint seeks to provide an even playing field on how fast the page loads and, more importantly, the moment when customers feel they should be able to interact.

Why it's good: LCP helps to explain the visual expectation of when the page is ready for customers. This gives us a great idea of how quickly the page renders the most important content for the customers and the point at which customers will start to interact with the page.

What to consider: LCP is only available in an official capacity on Chromium browsers such as Chrome, Edge, etc. While the concepts of improving customer experience will still help non-chromium such as Safari and Firefox, there is no official support in those browsers.

Additionally, the object expected to be the LCP and the actual LCP object is occasionally different. Ensure to understand what the LCP object is during analysis.