The Tag property is a property that your site can use however you choose. You do not need to specify the Tag property to define a managed object.
The Tag property makes filtering of managed objects easier. The tag acts as an identifier, and entering Tag values that follow a consistent scheme can eliminate the need for complex filters or naming conventions.
Example of Using the Tag Property to Filter Managed Objects
Your site wants to have different zones for a day and night shift. You know that the managed objects at your site fall into three categories: the objects that need to be managed during the day, the night, and both day and night. For the Tag property value, you can enter Days, Nights, or nothing for each managed object depending on the zone that you want the object to be a part of. Create the following managed groups and filter conditions:
A managed group called Common Objects that contains a filter condition on Objects with a Tag = (empty string).
A managed group called Day Shift Objects that contains a filter condition on Objects with Tag = Days.
A managed group called Night Shift Objects that contains a filter condition on Objects with Tag = Nights.
Then you could create two zones called Day Shift and Night Shift. The Day Shift zone will include managed groups Common Objects and Day Shift Objects. The Night Shift zone will include managed groups Common Objects and Night Shift Objects.
If your site manages systems at different locations or for different clients, you can use the Tag property to identify the location or client.