It is really easy to add descriptions, they are just lines of plain text, for example, for the WordPress page:
description: Technology co-operatives who can help you with the design, deployment, hosting and managment of WordPress sites, WordPress is the worlds leading open source web based content management software.
You don’t need to know how to use git, you can simply edit these files using a web browser and when you save them then the dev site is automatically updated and if that looks OK you simply have a button to click to update the live site.
Would anyone like to help write descriptions for pages? It would really help with SEO for the site .