There are several additional features available with the 2016.2 release for Jive-X cloud customers surroundings SEO. This document provides additional details for it SEO - 2016.2 Deep Dive .
In regards to tagging a space. This can be acheived by performing the following steps:
- Navigate to the space in question
- Click the manage drop down (you have to be the space's admin to do this) and choose Settings
- Click the blue "About" button
- A window should pop up with a field for tags
Hope this helps.