How to Add Custom Fields to Products?

If you need to include additional fields in the single product page and display them on the front-end, you can make it in an easy way without coding using a combination of TheGem's Custom Fields, Advanced Custom Fields (ACF) or Toolset plugins (for adding the custom fields in back-end) and Custom Fields content element (for displaying these custom fields on front-end).

Check this article which explains in details this process based on the example of Advanced Custom Fields (ACF) plugin.