Documents and data. What are they?

[iMore Question]

What is this?
What does it do/what documents and data is it talking about?
What might happen if I disable it - I have calendar and contacts synced over icloud?

 

[rayz336]

Documents and data

It's app data, so things like timeline sync in Tweetbot. You could lose sync between devices by turning the setting off.

 

[Jaguarr40]

It is really best to leave this setting on so anything you do pertaining to just what it says can be backed up. Please read this.

iCloud: Documents in the Cloud