A common issue that exists with data provided from a local municipality or agency is that it doesn't usually come with any associated style. The following is an example of building data being added to a model.
When the shape file was added, a single style can be selected, but why would we want each building to have the same facade. Style rules allow the user to randomize the data. In order to deal with these situations, we can use the style rules palette. This can be found on the home tab of the ribbon.