Largest Contentful Paint (LCP) and How to Improve It
Largest Contentful Paint measures how long it takes for the biggest piece of content above the fold — usually a hero image, banner or heading — to finish loading. It is the moment a visitor feels the page has arrived.
A good LCP is under 2.5 seconds. This article explains what drags it out and the practical fixes we apply.
How We Measure LCP
We never rely on a single test. LCP varies by device, connection and even which element is largest on a given page, so we measure across realistic conditions before and after any change.
- Check the LCP element each page is waiting on.
- Measure on both a fast desktop and a mid-range phone.
- Compare lab results against real-visitor data.
- Re-measure after each fix to confirm the gain.
What a Good LCP Feels Like
From a visitor's point of view, a good LCP is the difference between a page that feels instant and one that leaves them staring at a blank or half-built screen. That first impression sets the tone for the whole visit.
- The headline and main image appear almost immediately.
- There is no long pause before anything meaningful shows.
- The page feels ready to use, not still loading.
- Visitors are far less likely to give up and leave.
What Slows LCP Down
- Large, uncompressed hero images that take too long to download.
- Slow server response, so the page starts late.
- Render-blocking CSS and JavaScript that must finish first.
- Web fonts that delay the headline text appearing.
How We Improve It
- Compress and correctly size the main image, and serve it in a modern format.
- Preload the hero image so the browser fetches it early.
- Reduce server response time with caching and better hosting.
- Defer non-essential scripts so they do not block the first paint.
Measuring the Result
We confirm improvements with both lab tools such as Lighthouse and field data from real visitors, because a number that looks good in testing must hold up on real devices and networks.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.