Step 1 – First make sure footer widgets are set to show, navigate to Appearance > Painting Options > Layout > Footer and select footer columns.
Step 2 – To add widgets, Navigate to Appearance > Widgets.
Step 3 – You will see 4 widget sections on the right hand side, Footer Widget 1-4. Your widgets are located on the left hand side.
Step 4 – Simply drag and drop the widgets you want from the left side into the sliding bar widget sections on the right side. See the screenshot below.