How do you tell if you need wide or extra wide shoes?

Hello there, I'm curious about something related to footwear. Could you please explain to me how one can determine if they need wide or extra wide shoes? I've heard that it's important to choose the right fit for our feet to avoid discomfort and potential issues, but I'm not quite sure how to go about it. Would you mind sharing some tips or methods for identifying the need for wider shoes? I'd greatly appreciate your insight on this matter.