How can I add a PDF file to a product description?

To insert a PDF file to a product description:

1. Go to Products, then select Products / Sku variations.
2. Search for and click on the product you want to edit.
3. Click Html description on the left access menu.
4. Place the cursor to where you want to insert the file, then click on the link icon.
    
5. Paste the URL of the PDF file into the field accordingly.
    
6. (Optional) Enter a name/description of the file in the "Display text" field.
7. Click OK.