You can add one at time, import a spreadsheet, or submit a grid of recipients
You would save a .csv file using the format of this file. All headers must be present as exactly as they are in the file.
The grid functions largely like an Excel spreadsheet. You can type directly into the grid or paste into it. The grid is recommended for use for only 100 or fewer recipients. For larger lists it is best to import a spreadsheet.
A list is a saved list of contacts that you give a name to. It helps for keeping things organized. It is required for automated campaigns.’ Also, lists are used as the basis for recurring campaings
Your address book is all of the contacts you add, wheter importing or adding indiviudally, whereas lists are individual groupings of contacts that you name and create. Lists are used for campaigns.