What do the downward arrows on top of screen represent

[AC Question]

On every screen displayed (apart from when apps are running) I see 4 downward facing arrows on the top left of screen.
What do they represent?
I am thinking that they represent apps running in the background. Is this correct?
I am concerned with how long a battery charge lasts even with WiFi and Bluetooth OFF and wonder if apps I have installed which may be running in the background consume much power.

 

[Javier P]

Welcome to the forums. It sounds like you downloaded something recently. Swipe down from the status bar and there should be some notifications showing what they are.