How does mobile network work?

Excuse me, could you please explain in simple terms how mobile networks actually function? I'm a bit confused about the process of how our phones are able to connect to the internet and communicate with each other, even when we're on the go. Is it something to do with satellites or cellular towers? And how does it all work seamlessly in the background, allowing us to send messages, make calls, and browse the web without any noticeable delays? I'd appreciate any clarity you could provide.