Click on the Settings icon then select Import
Download the XLS Template by clicking on the XLS icon then copy/paste your Leads or Contacts into the template.
Make sure your columns match the appropriate Column Headers for each Field
Select Choose File and open your New Template
Choose a record type (Leads or Contacts).
Choose who the records will be assigned to
Apply the Cadence you setup by clicking on the checkbox
Double check your data matches the appropriate Column Headers then select Import Data
Go to the Leads, Contacts, Companies and Opportunities to start prospecting!