Putting an app to sleep on Android Phone

[SteveBrickNJ]

My Samsung android phone displayed that an app I want to use during my upcoming visit to Denmark is using up a lot of my battery life.
I followed my phone's prompt and tapped on "Put app to sleep".
So, what does that actually do?
......and I assume WHEN I actually need the app I can select it and use it without any additional steps to "wake it up"?

 

[SteveBrickNJ]

wdwmagic's software displayed that as of 10:56am EST on Sat. I had received 87 views of this thread yet there were 0 responses.
So, I went to Google and asked my question electronically.
Here's what I came up with....
*

Manage Sleeping apps to save battery life on your Galaxy device

Apps running in the background all day drain your phone or tablet battery quickly. You can set unused apps to sleep in the background to save battery life.

www.samsung.com