Ultra data saving is a Samsung app developed for Samsung devices. It limits how much data your background apps are using so you can save a huge quantity of MBs at the end of the month.
When you open up an app it uses up data in both the foreground and background, so some apps might be burning through your MBs a lot faster than you might expect. If you want to avoid that issue on your Samsung smartphone, Samsung Ultra data saving is here to help by cutting off any apps that are running uselessly in the background. That way you won't have to change any settings on your overall data configuration, instead, you can individually control permissions for apps running in the background on your Samsung smartphone and automatically stop wasting data.