With the Task Manager, you can close applications and apps that are currently running in the background of your Android OS, installed on the Samsung Galaxy S5. The Task Manager can be easily found in the following way on the Samsung Galaxy S5:
Tap once on the left soft key button, which displays the recent apps running in the normal case. You will now find an icon in the lower left corner in the form of a pie chart. Tap on this and it will open the Task Manager oof your Android OS.
You will find the RAM status and the active applications. In the running application section you can see the RAM, which is used by this app and also the required CPU power. Click the button "End" and you can stop a application running in the background.
Alternatively, you can use the button "End All" to stop all apps which are on stand-by.