Google’s report card for how your pages feel to real people. CrUX collects performance data from actual Chrome visits over the last 28 days and grades three things.
- How fast the main content loads (LCP, good is 2.5 seconds or less).
- How fast the page responds when someone taps or clicks (INP, 200 milliseconds or less).
- How much the layout jumps around (CLS, 0.1 or less).
Hit all three on 75% of visits and you pass. Google uses the results as a search ranking signal.
Here’s the ad tech problem: Header bidding wrappers, heavy ad tags and late-loading ad slots drag down all three. An ad that shoves the article down the page is a CLS hit. A wrapper hogging the browser is an INP hit.
Reserve space for your ad slots, trim the tag stack and check your CrUX numbers in Search Console every month.
