hulkplugins

This plugin enables the TinyMCE (WYSIWYG) editor for WooCommerce product categories and tags “description”. This lets you easily add text formats like H1, and H2 titles, bullet points, images, and bold text. This would be great for SEO purposes.

Term Description: Rich Text Editor (Powered by TinyMCE) for WooCommerce

You can easily add the TinyMCE (WYSIWYG) editor to WooCommerce product categories and tags "description" for better formatting options.

kubiq

This plugin will replace raw textarea by TinyMCE WYSIWYG editor when “Use HTML content type” is checked. 
Works for both Mail and Mail (2) in Contact Form 7.

Contact Form 7 – email body TinyMCE editor

TinyMCE WYSIWYG editor when "Use HTML content type" is checked in Contact Form 7 Mail and Mail (2)

Term Description: Rich Text Editor (Powered by TinyMCE) for WooCommerce vs Contact Form 7 – email body TinyMCE editor