After you publish the item, click the "Share" button. In the popup screen, click the Shopify tab, and click the "Copy code" button.

Either use an existing page or open a new page for adding the item.

In the editor of the page, click on the ‘</>’ icon. In the HTML editor that opens paste the item code you copied in step 1 and click save/create page.

Save the page & preview to see how the item looks on the page you created and make changes to your page accordingly.

That's it!