Performance / LCP
Largest Contentful Paint
Plain-language definitionA Core Web Vital that measures when the largest visible content element finishes rendering. Server response, media loading, and render-blocking resources all affect it.
Why it matters
Use the term to make a better decision.
In practice, largest contentful paint matters when a team needs to connect a technical or creative choice to a visible change in clarity, performance, discovery, or conversion. The useful question is not whether the term sounds sophisticated. It is what decision it helps the team make.