Yes, it is possible to link a Shopify store to an existing website. Here are some of the methods based on the search results:

Using Shopify’s buy button: Shopify’s buy button allows users to add a “buy now” button to any page on their website. This button will take customers to the Shopify checkout page, where they can complete their purchase. To use Shopify’s buy button, users need to create an account and follow the instructions on their website. Once they have their buy button code, they can add it to any page on their website. This is a simple way to link a Shopify store to an existing website2.
Using Shopify’s platform: Shopify’s platform allows users to create a complete online store on their website. This means that users can use Shopify to manage their products, inventory, and orders, and they can use their website to display their products and process orders. To use Shopify’s platform, users need to create a Shopify account and install the Shopify software. Once they have installed the software, they need to configure their website’s settings to allow Shopify to embed. Users can find instructions for configuring their website’s settings on Shopify’s website. Once they have configured their website’s settings, they need to add a Shopify shop to their website. This method requires more setup but provides a more integrated experience for customers1 5.
Using an iframe: Users can embed a Shopify store in a website using an iframe. To do this, they need to go to their Shopify dashboard and click on “Products.” Then, they need to click “Add product.” From there, they will be able to add all of the products they want to sell on their website. Once they have added their products, they can use an iframe to embed their Shopify store in their website. This method requires some technical knowledge but provides more control over the appearance of the Shopify store on the website3 6.

In summary, it is possible to link a Shopify store to an existing website using Shopify’s buy button, Shopify’s platform, or an iframe. It’s important to evaluate these methods based on the specific needs and goals of the business and adjust them accordingly.