Widgets are mini-apps (e.g., weather, clock, calendar, etc.) that can be added to a Home screen. They aren't the same as shortcuts as they generally display info and take up more space than a single icon.
From a Home screen, touch and hold an empty space.
Tap Widgets (at the bottom).
Touch and hold a widget.
Drag the widget to the preferred Home screen then release.
For the widget to be successfully added, there must be sufficient space on the desired screen.
If applicable, tap additional options to activate widget.
Options vary depending upon the type of widget.