You can insert variables like name, address, company, LTV, email, etc. in the body of the email. They pull a value for each email recipient automatically so each email is personalized even when you send them in bulk.
To insert those variables:
Drag a text block in place and start typing in it.
From the edit menu, choose Merge tags.
Just click the variable you want to use - it'll be inserted in the text you're typing.
Note: this is the way to add an unsubscribe link which you will need to have in every email. Just drag a text block at the end of the template and isnert an unsub variable.