To add Contacts to a Campaign without having to do it one by one, you can use the filtered list view.
1. Click on Contacts.
2. Click on the dropdown and choose the list view you want to use.
3. Choose the Contacts you want to add to the Campaign by putting a checkmark on the box before each contact. Click the Add to Campaign button.
4. Choose the Campaign you want to add the Contacts to. Click Submit.