Many users of your page visit over a slow cellular network connection. Ensuring that your page loads fast over a simulated mobile network ensures that your page loads in a reasonable amount of time for your mobile users.
There are two main metrics regarding how users perceive load time:
- The page appears visually complete.
- The page is interactive. If a page appears visually complete at 1s, but the user can't interact with it until 10s, then the perceived page load time is 10s.
Lighthouse computes what time to interactive would be on a slow 4G network connection. If the time to interactive is less than 10s, the audit passes.
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