What are merge tags?

The basics

Merge tags are data specific to each prospect (i.e. first name, title) that you provide to Sendbloom when adding prospects (think columns in your .csv file or in your Salesforce report or view)

How can I personalize my campaign with Merge Tags? 

Merge tags can be used for personalizing  touches in a campaign (i.e. Hi {{first_name}}) and to create rules to define segments (i.e. segment 1 is any prospect whose {{title}} contains manager or director or whose {{time_zone}} = PST).