Once created and active, widgets automatically find a good position on the page and display themselves. To open a widget in the store, click the 3-dotted button next to widget and click 'View in store'. This will open the widget in a store page where it is displayed.
If the widget is not showing in the store or you want the change its position, you can use following guides.
If your theme supports Online Store 2.0, you can use our app blocks in the Shopify theme editor to embed widgets in the page. Please follow this guide to create app blocks.
If you are using a vintage theme, you can use CSS selectors to position elements in the page