Should I turn sync on or off on Android?

Hello there, I'm curious about something related to my Android device. I've been seeing this option in my settings about turning sync on or off, and I'm not quite sure which one to choose. Could you please explain the difference between these two options and help me understand which one would be more beneficial for me? I'm worried that if I turn it on, it might consume more battery or data, but I also want to make sure I'm not missing out on any important updates or information. Thank you for your help!