The widget is available on devices that run iOS 8 and later.
To activate it you need to go to your device's main screen, swipe all the way over to the left and you will see your widget screen.
Scroll down to the bottom and press edit to see a list of all the widgets you can add, find Forza Football and click the + button to add it.
The widget will then show the days matches that you follow.
If you click on those matches it will take you to the match page in the app.
Here is a quick video illustrating how to do it: