Adding a comments section to a page is easy with Disqus (https://disqus.com/).
Account creation and installation code
- Sign up for an account at https://disqus.com/
- Go to Admin menu > Settings > Installation
- Select the "Universal code" option and copy the embed code
Installing Disqus on a page
- Go to Pages
- Edit page
- Click the HTML code button on the WYSIWYG editor
- Typically the Disqus embed code should be placed at the bottom of your page
- Click Save
Learn More about commenting on Disqus: https://help.disqus.com/commenting/guest-commenting