Hi RVianna,
First of all, we will definitely add information about Tag Cloud functions in next update.
Main functions:
Size: the more popular (important) tag is in the book(s), the bigger it will be in the Tag Cloud.
Color-wrong:
- red color of a tag means all your answers to questions with the tag are wrong
- green color of a tag means all your answers to questions with the tag are right
Color-time:
- red color of a tag means your answers to questions with the tag took more than 2 minutes.
- yellow color of a tag means your answers to questions with the tag took more than 1:30 minutes but less than 2 minutes.
In other words, if you see big red tag, it means you should pay attention either to time or your ability to get questions with that tag (concept) right.
Let me know if you have any other questions
Best,
Walker