It is important to understand this feature opens the product directly into the Customizer once click on by the customer. It removes the normal product listing page where the customer sees the product and the information you choose to supply. See the screenshot below of what the customer journey looks like. 

The below product page listing is removed when you activate the customizable template. 

To turn a product into a customizable template please follow the steps below:

• Go into your Shopify backend, select Products and then select the product for which you would like to edit the button.
• Scroll down on the poduct listing page and find the “Theme templates” drop down menu.
• Select the “product.cyo-deeplink” theme.
• Using this feature will open the product directly in the Customizer, once the product listing is clicked by the customer.