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

To insert a PDF file to a product description:

1. Go to Products > Products / Sku variations.
2. Open/edit the product by clicking on it.
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.