Personalization of content can be used to inject a contact's profile data into an email.
Use %FIRST_NAME% to insert the contact's name
Use %EMAIL% to insert their email address
You can bring up a list of fields for personalization options by clicking the personalize dropdown menu in the toolbar when editing text:
Click an option from the list to insert the corresponding personalization option into the email.
Note: You cannot insert a tag in your personalized email.
Pathfinder Pro account holders can insert Custom fields in addition to standard personalization options.
If your customer data is not complete, read about the Fallback text workaround.