In Shopify, we use the json file to manage most of template files, so we can easily link new section.liquid file to add new section to the default template.
For example:
Just add a new section to the default product template:

In Shopify, we use the json file to manage most of template files, so we can easily link new section.liquid file to add new section to the default template.
For example:
Just add a new section to the default product template:
