Editing code for specific pages

Hi,

Just wondering if someone can help me. I’m pretty new to html and wordpress and I would like to customise a part of the “project”/”portfolio” pages that show up when someone clicks on a particular project/product on our page. Here’s the link to an example of the style of page that I want to customise: https://www.webbinternationalsales.com/products/09905-09906/
I would like to change “project description” to “product description” for all of this kind of page but I can’t seem to locate the code for these pages to amend. Can anyone help?
Thanks and Regards
Aaron