Displaying a section on a product page
1. Create a section.
2. Copy the shortcode from the bottom of the section editor page.
3. Go to ‘Shopify Admin > Online Store > Themes > Theme Actions > Edit code’ and look for the file that represents the product page template, in the majority of the themes it's '/sections/product-template.liquid'.
4. Paste the shortcode below the end of the 'Add to cart' form (or the other place that you like).
5. Click 'Save'.