How do I improve Largest Contentful Paint?

Find what is on the critical path before the largest element can paint, and remove it. Usually a render-blocking stylesheet, a late-discovered font, an oversized image, or a client-rendered page where nothing paints until a bundle executes.

Why is my website slow?

Usually one of four things: unoptimised images, render-blocking CSS or JavaScript, a slow server response, or a framework executing before anything paints. Measure first — the cause is almost never what people assume, and fixing the wrong one changes nothing.

Does page speed affect Google rankings?

Yes, but less than commonly claimed. Core Web Vitals are a real ranking input and behave more like a tie-breaker between otherwise comparable pages. The larger, more reliable effect of speed is on conversion — slow pages lose customers regardless of ranking.

Performance

What are Core Web Vitals?

Three metrics Google uses to measure page experience: Largest Contentful Paint for loading, Interaction to Next Paint for responsiveness, and Cumulative Layout Shift for visual stability. They are assessed on real visitor data over a rolling 28-day window.

Answered by Anas Bin Masud 152 words 3 sections

The targets

Metric	Measures	Good
LCP	When the largest visible element renders	Under 2.5s
INP	How fast the page responds to interaction	Under 200ms
CLS	How much content moves after painting	Under 0.1

Fix them in this order

LCP first — usually one blocking resource, and the largest visible improvement. CLS second, because it is cheap: declare image dimensions and use a metric-matched font fallback. INP last, because it needs less JavaScript rather than reordered JavaScript.

How much they affect rankings

Less than most vendors imply and more than zero — realistically a tie-breaker between comparable pages. The stronger business case is conversion: slow pages lose customers regardless of what any search engine thinks.

The longer version

This answer is deliberately short. If you want the full treatment, Core Web Vitals, and the order that actually reduces them covers it in about 3 minutes — free, ungated, written from client work.

Who answered this

Anas Bin Masud builds e-commerce sites and does technical SEO for businesses in the UK, Canada and Pakistan — fifteen live client sites, six of them stores taking real payments. These answers come from those projects rather than from a content brief. More about how I work, or ask me something directly.