How much does website speed affect search visibility?
Speed is a search ranking factor, but it does not carry decisive weight. The bigger loss happens when someone who clicked through from the search results leaves before the screen appears. The moment the first screen is drawn on mobile matters most.
The first screen matters more than the score
The score from a measurement tool is only a reference. The same site gets a different score each time it is measured. How many seconds it takes for the first screen to appear is closer to what users actually feel than how many points the score went up.
The most common cause is a large image uploaded at its original size on the first screen. Just shrinking it to the size shown on screen and converting it to a modern image format makes a big difference.
Keep the layout from shifting
Sometimes, just as you start reading, an image or ad loads late and pushes the content down. It is one of the most annoying experiences for users, and it is also one of the measured items.
Setting the width and height of images and videos lets the browser reserve the space in advance, so nothing gets pushed.
Mobile is the standard
Search engines evaluate sites based on the mobile screen. Looking good on a PC is only a given, not the basis of judgment.
The fastest way is to check on a real phone whether buttons are big enough to tap, whether text is readable without zooming, and whether horizontal scrolling appears.
Frequently asked questions
What speed score is good enough?
It is hard to state a fixed threshold. Rather than making the score itself the goal, removing the causes of a slow first screen one by one is more effective.
References
- web.dev — Web Vitals (새 창에서 열림)
- Google Search Central — Page experience (새 창에서 열림)
Related reading
WiSite handles this for you automatically
The technical elements described here are applied automatically when your site is created.