Can you switch a 15 amp to a 20 amp?

Excuse me, I was wondering if you could provide some insight on a question I have regarding electrical wiring. Specifically, I'm curious about the feasibility of switching from a 15 amp circuit breaker or outlet to a 20 amp one. I understand that there are differences in terms of their capacity and the amount of electrical current they can safely handle. Could you elaborate on what factors I should consider before making such a change, and whether it's generally advisable or not? Additionally, would it require any specialized tools or expertise to execute this kind of swap? Thank you for your time and assistance.