The Lead, Account and Contact Merge function is a powerful tool because it goes way beyond simply deleting a duplicate record. It provides a method of creating a single record that is an aggregate of multiple records and preserve all of the related lists. The resulting record will be more information rich than any of the individual records prior to the merge. The main advantage is that you can do it inside of your Inbox, so you don’t need to switch between Salesforce and your Mailbox. It saves a lot of time on this important lead process operation.