To message out of Buzz360 you need to have Audiences. To create an Audience
Go to "Contacts"
Select "Filters"
Select the criteria to identify your target group
Save the set of filters as an audience (top menu shows "save as Audience")
You now have an Audience
Tip: Filters can use "and" and "or" to add another element of filters. You can NOT combine the two. A useful operator is "any of" - this allows you to "or" a number of elements together. Example: AgeRange is "any of" 26-35, 36-45, 46-55 This will get you all between 26 and 55.