Déjà vu is simply a harmless "brain hiccup" that happens when your mind briefly confuses a new moment with an old memory because they feel slightly similar. You don't need to do anything to fix it, as it is a normal experience for almost everyone and not a sign that something is wrong. The biggest benefit is knowing you can stay calm when it happens, as understanding that it is just a funny little trick your brain plays on you provides peace of mind and stops unnecessary worry.
