1. Mail Merge in Ms-Word 2010 Mail merge is a software function describing the production of multiple (and potentially large numbers of) documents from a single template form and a structured data source.softwaredocumentstemplate formdata source

2. You use mail merge when you want to create a set of documents that are essentially the same but where each document contains unique elements. For example, in a letter that announces a new product, your company logo and the text about the product will appear in each letter, and the address and greeting line will be different in each letter.

3. (E)Mail merge often refers to combining a list or database of email addresses (sometimes names and other data too) with a mass (batch) emailing. For example, a company can email some or all the customers in their database with a similar message and include the name of each customer in the greeting.