Google Grades Your Website — Here's How to See Your Report Card

What Lighthouse actually measures

Lighthouse scores a website 0–100 in four categories. In owner's terms:

• ✦Performance — how fast the page actually appears on a customer's phone.
• ✦Accessibility — whether people with imperfect eyesight, older devices, or screen readers can still use it.
• ✦Best Practices — is it built the way modern, secure sites are supposed to be built.
• ✦SEO — can Google properly read and understand the page at all.

Check yours in 60 seconds

Go to pagespeed.web.dev, paste your website address, and press Analyze. That's the whole tutorial. You'll get a phone score and a desktop score — look at both, but care more about the phone one, because that's where most of your customers are.

Reading the colors: 90–100 is green (healthy), 50–89 is orange (needs work), below 50 is red (likely costing you customers). Scores wobble a point or two between runs — that's normal. The color band is what matters.

What the numbers mean for your money

More than 70% of your visitors arrive on phones, and a slow page loses them in seconds — they don't complain, they just tap back and pick the next result. That's what a low Performance score is measuring: customers you never knew you had.

One honest caveat, because this gets oversold: a high Lighthouse score doesn't directly buy you rankings. But the things it measures — real speed, mobile experience, whether Google can read your pages — feed the same systems that decide where you show up. A green report card doesn't guarantee you win; a red one means you're playing at a real disadvantage.

What good looks like (receipts included)

So that this isn't just talk: every client site in my current portfolio measures 90 or higher in all four categories on desktop (audited July 2026), and six of them score a perfect 100 across the board — you can see the audited numbers next to each project on my work page, and you're welcome to re-run any of them yourself on pagespeed.web.dev.

If yours came back orange or red

First: it's fixable, and it's usually one of a few culprits — oversized photos, template bloat loading code you never use, or missing basics that block Google from reading the page. Sometimes a targeted fix rescues the score; sometimes the honest answer is that a rebuild costs less than a rescue. Either way, now you know something about your business you didn't know ten minutes ago.