System apps, also known as bloatware, come pre-installed on Android phones and can include carrier apps and manufacturer apps like Samsung Bixby.
While system apps don't pose security risks, they can display ads, such as the Realme file manager app.
You can't uninstall system apps on Android, but you can disable them to reduce storage consumption. Uninstalling updates and using tools like Debloater or rooting are other methods.
Rooting your phone to uninstall system apps is not recommended due to warranty voiding and potential risks associated with third-party apps.