It allows you to merge two customers together, into one Primary Customer Profile.
You may want to do this if a new Customer Profile was created by accident, i.e. if a customer accidentally put a typo into their email address when purchasing tickets, or if they have two different email addresses but would like records to be stored under just one.
When merging, you can choose which profile is the Primary Customer and these details will be prioritised.
Any addresses and phone numbers will be combined with the Primary Customer's and all Orders and Opt In responses will be moved onto the Primary Customer Profile.
The First, Last Name and Email Address of the Secondary Customer will be removed from the system.
NOTE - once two customers have been merged they cannot be separated.