Go to Appearances>Customize>Widgets>Footer 1, 2 and 3.
You can easily Add Widgets from the Footer Area 1, 2 and 3.
Go to Dashboard then Appearance then Customization and finally Widgets.
Step 1:- Click any Footer i.e. 1, 2 and 3
Step 2:- Add a Widget
After Clicking Add a Widget, it gives you Search Options, Select as per your need.
Note: You can repeat the following steps for Footer 2 and Footer 3.