What is checking account?

I would like to understand what a checking account is and how it works in everyday banking. How is it different from a savings account, and what is it mainly used for? I’ve seen banks like Wells Fargo and Citibank offer checking accounts with features like debit cards and online payments, but I’m not sure how they function.

Can someone explain the purpose of a checking account, its key features, and any common fees or requirements? A simple and beginner-friendly explanation would be very helpful. What is checking account of Bank?