Email Campaign is generally considered as the Marketing campaign, which falls under the Digital Marketing domain. Now, the purpose of the Email campaign is to connect with a large audience base, through the internet using emails, on a more personal note. An email campaign is more dynamic in nature, and connects directly with customers, without any mediators. Generally, Email campaigns run longer, sending multiple emails consistently on a periodic basis. If you are aspiring to break into the Digital Marketing domain, then have a look at the Digital Marketing course, from Intellipaat. Also, have a look at the following video on Email Marketing.