How to stop apps from running in the background on Android

I noticed some apps keep draining my battery even when I'm not using them. How do I stop them from running in the background?

Go to Settings > Apps > Select the app > Battery > Tap "Restricted" to limit background activity.

You can also enable "Battery Saver" mode which automatically limits background usage for most apps.

Consider uninstalling unused apps and using tools like "Greenify" if your phone supports it.