Caching reduces the load on your site by storing the results of a request, so that it can be served to the next visitor. This significantly increases the speed of the site. However, this can lead to a visitor receiving an old version of the page. This can be fixed by clearing the cache below.
Note: Cache is cleared by environment not by domain.
Clear all caches at once
This will slow down your site until caches are rebuilt.
For multisite environments, using this tool will clear caches for all sites. This will slow down your sites until caches are rebuilt