Web browsers store cached versions of websites to make them load faster, save bandwidth, provide offline access, and improve responsiveness. Caching reduces the load on web servers.
If you previously used your domain for another website, your browser has likely cached your site to make it easier for you.
If you visit your domain URL after changing it to point to your new website and your old website appears, you will want to clear your browser cache.
This only affects computers that have visited your site frequently and therefore created a cached version.This situation primarily impacts individuals who regularly access their own websites, as they tend to be the most frequent visitors.
If you don't manually clear your cache, your browser will catalog the change over a few days, resolving the issue automatically.