This feature is available if your theme includes a Sidebar manager or if you have Wolf Sidebars plugin installed ( eg: bundled in Flycase Theme )

To create a widget area  go in your sidebar manager panel. Create a new sidebar using the “widget area” type.

widget-area

You will find a new widget area available in your WordPress Widgets panel (appearence -> widgets)

Paste the widget you want in it.

Then, to display your widgets in your post or page, paste the widget area shortcode (you can find it in the sidebar panel, next to your new sidebebar in the list) or simply use the widget area shortcode generator in your text editor toolbar.

The shortcode generator button is this one below

w-a-button2