Locate and click on your menu/options button.
This may be an icon with either 3 lines or 3 dots
Select 'add device to homescreen' if available.
It may be neccessary to 'bookmark' or 'favourite' the app first, then select to store the bookmark on your home screen.
If your device doesn't have any of the options above, consider Googling:
"How to save a website to the homescreen on a your device name"