Contact finder helps you find people in your phone address book automatically. If you wish to use Contact Finder, contacts who are on Wickr Me and opted in to use ID Connections to associate their phone number with their Wickr Accounts will populate in your Wickr contact list.
This feature is optional, but it may be helpful to you in connecting with your existing device contacts in a secure manner. You can always turn that off when you no longer want it active.
This feature can be found in the Settings of your Wickr app.