The Contact Filters functionality appears in many places on Makerble
The front-end user guide explanation is here Filter Contacts by...
Places where the Contact Filters functionality appears
Manage Contacts pages Filter Contacts by...
Progress Board Contact Filters on a Progress Board
Send a Survey to contacts Manually send a survey to a contact in Identifiable Mode
Maps page See contacts on a map
Homepage in the Contacts widget
Create Broadcast (sending message via sms, email or mailchimp)