To perform actions on contacts first you select contacts by pressing checkbox in front of it. Blue “ACTIONS” button will be available in top right corner. Then from dropdown menu select action you want to complete. Also when marking checkboxes "MARKETING" button will light up and you can perform bulk marketing actions.
Duplicate - duplicate contact
Archive - archive contact
Delete - remove from Salestrekker
Available Marketing actions:
Send E-Mail - send E-Mail marketing campaign to selected contacts
Send SMS - send SMS marketing campaign to selected contacts
Add to MailChimp list* - if MailChimp integration is enabled in Settings