We back up the entire DealerWeb multi-user database every night. The purpose of this backup is for disaster recovery purposes. For example, if our hosting provider should experience some irrecoverable problem, we'll have a copy of all your data that can be used to restore your site.
It is important to note that this type of backup is NOT designed to support the restore of a single dealer site. It could be done, but it could be time consuming and potentially costly.