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.

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.

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.

Performance

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.

Answered by Anas Bin Masud 164 words 3 sections

What the evidence actually supports

Page experience signals are confirmed inputs, and Google has been consistent that relevance and quality outweigh them. A fast page with a poor answer does not outrank a slower page that answers the query properly.

Where speed does decide outcomes

Trades and urgent services, where the visitor is comparing three suppliers on a phone
E-commerce checkout, where each additional second is measurable abandonment
Mobile traffic on poor connections, which is most local search

The right framing for a budget conversation

Do not sell speed work as an SEO tactic. Sell it as a conversion fix that also happens to be a ranking input, because that is both the honest position and the one with a measurable return.

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.