good Needs improvement Poor
LCP ≤2.5s ≤4s >4s
Foreign Investment Agency ≤100ms ≤300ms >300ms
CLS ≤0.1 ≤0.25 >0.25
Because FID is a statistic measured only through real user interactions, it cannot be replicated in a lab environment.
However, Total Blocking Time (TBT) is a measure of how long the browser is blocked, and therefore can approximate FID. This is why you’ll see TBT instead of FID in Semrush’s Core Web Vitals report.
As mentioned above, any task that takes a long time to complete, and therefore blocks the browser's main thread and prevents it from immediately executing new tasks, will result in poor FID.
Reasons for low FID scores
Most of the time, main thread delays and blocking occur during the page ecuador mobile database loading phase, when the content is already displayed but the loading has not yet completed.
How to Fix a Poor FIDTBT
How to Fix a Poor FIDTBT
Since most of the FID-related blocking we see occurs during the page load phase, you can reduce TBT and FID by optimizing the page's main thread.
The best approach is to eliminate long tasks.
A long task is any task that blocks the main thread for more than 50 milliseconds.
Potentially, if users click on clickable elements in their browser during a lengthy task, they will see a delayed response.
Luckily, with the help of Lighthouse and Semrush, it’s easy to drill down into your pages and identify long-term tasks.
First, you should understand which pages have issues. Is it a template issue or just a specific page like the homepage?