...
If your content type is enabled to create new revisions, Content Sync will do the same. So anytime an update is pulled from a remote site, a new revision will be created. This allows you to quickly switch back to an older revision in case of any issues.
Fields
By default, Content Sync will include all of your fields when pushing or pulling content. You can overwrite this per field to exclude fields whose content you don’t want to syndicate, e.g. if they’re site-specific.
...