Currently, in odoo, you can add website product description just from frontend if you want to add a description at product create or even after from backend you can do it easily using Website Description. This module provides an HTML field for description so you can edit and customize your description easily.
Features
1) Easy to add description from the backend(While creating a product or even after).
2) Easy to customize or edit your description.
3) Users can add or edit descriptions both side frontend and backend.
4) No other configuration required.
5) Easy to install and use it.
Versions
v13.0
v12.0
v11.0
v10.0
Installations
1) You will receive the link to download the zip file of the module please download it.
2) Extract the zip file, you will see folder named ‘sh_website_description’.
3) Copy and paste this folder inside your Odoo Addons path / Custom Addons Path.