This tutorial explains how to set up a recurring and a continuous delivery and the differences between the two approaches.
The recurring and continuous deliveries differ in the way contact data is managed:
The continuous delivery lets you add new recipients to an existing delivery and avoids you having to create a new delivery each time a new recipient is added. You can update the creative directly in the campaign workflow and it will update the template in the delivery template Resource folder.
A continuous delivery will create a SINGLE delivery and delivery logs (broadLog) and tracking logs that reference that one delivery are added each time it executes.
This video explains how to configure a recurring delivery and a scheduler activity.
This video shows how to configure a continuous delivery with an incremental query.