The User Condition gives you perfect control over who exactly is going to be able to see your box. The only information that you need to know is naturally the User ID which you can see from Joomla's User list.
In the table below you can see which options are available to setup the User Condition.
|Set whether to match or not the selected users.
|Select and add multiple users to the list.
A very common use case for the User Condition is when you want to display a particular message to one or more specific users who may have won a contest in your Joomla website and you'd like to congratulate them or award them their gift.