Shopify's Buy Button lets you sell products directly on your website without redirects, requiring an active Shopify plan. More setup details are available online.
Shopify offers a feature called the Buy Button, which allows you to sell your products directly from your own website. With this feature, your customers can complete their purchase without being redirected to another page.
Please note that the Buy Button requires an active Shopify plan.
You can find detailed information about how to set up and use the Buy Button here.
More information on the Shopify Integration here.