You can then go to that app and tinker with the settings, perhaps set it to update on Wi-Fi only.
Smartphones are complex beasties and sometimes things just stop working.
This might be a desktop app, but more frequently, it's becoming part of the device when you set it up for the first time.
Android now also has the option to restore a previous backup, or set up a device from scratch, as well as offering you the chance to transfer data wirelessly to setup things like your accounts and settings.
Although some contracts give you unlimited data, it's always worth looking out for how much you're consuming, so that you can avoid an unwanted bill by making sure you don't go over your data limit.