All product pages in the Flex theme include the option to enable Recommended products section for the Product page. This platform-based system displays automatically-generated product recommendations based on an algorithm using purchase history, product description, and related collections as data.
The product will have to be in a Collection in order for recommended products to show up. If the product is not in a collection, then no recommended products will display.
Enable for Product Page
In the theme editor (Customize), use the page selector to open Products, then Default product.
In the left sidebar, open Recommended products.
Click the checkbox to enable Show dynamic recommendations.
Layout Options
Select either Slider or Grid [default] for the section's Layout setting.
Include a Heading
Add a Heading using the provided field. Leave the field blank to exclude a heading.
Products Per Row
Use the Products per row slider to display 2, 3, or 4 products per row.
Limit products
You can limit the number of products you'd like to appear in the recommended products. Choose between 2 - 10.
Height
If your product images vary in size and height, enable the Align to height setting to increase consistency. After that's enabled, you can then adjust the height for the collection images anywhere from 150 - 400px with the Product image height slider
Specify Recommended Products
If you'd like certain products to show up as recommended products, you will need to create a specific collection.
This will overwrite Shopify's algorithm meaning that the products won't display dynamically or improve over time
Create the new collection and make note of the collection's handle. The collection's handle can be seen by clicking Edit Website SEO within the collection itself.
Then, go back to your product and add a new tag that specifies the collection's handle:
meta-related-collection-handle-name
So in this example, since the collection handle is featured-sneakers, so in our example product: 'Flash Classic Sneaker' the tag to add would be meta-related-collection-featured-sneakers
The products in this collection should now be displayed in the Recommended Products section: