Action changes to loading state when pressed

Keep users in the loop about what's going on in the system. After users change their information and press the Save Changes button, show that saving is in progress. This communicates that the interaction was successful, and users didn't waste their time.

A common way to show that changes are being saved is by using a loader — either as a CTA button state or a full-screen one. If the process takes a while, add a message stating so or some tips and fun facts to make the wait less boring.