You've written a blog post that has wide appeal beyond just your target audience. You test promotion of that blog post via a paid Facebook ad, and find that the CPC is lower than your typical paid expenditures, and is driving 40% more site traffic than those typical expenditures. Even so, when you turn off that budget you lose that traffic ... right? Right. But you still received a huge influx of traffic that, even if none of them convert to leads, might have spurred either inbound links or social shares -- both of which will help bolster your SEO.
A generation ago, consumers were at the mercy of advertisers who spoon-fed them marketing messages across a few media channels: print, billboards, television, radio. These advertisers created markets, defining and reinforcing consumer stereotypes. In the 1950s, advertising was primarily a one-way conversation with a captive audience. TV advertising grew and matured into a viable marketing medium. Experts were the style makers.
Digital marketing is the marketing of products or services using digital technologies, mainly on the Internet, but also including mobile phones, display advertising,and any other digital medium. Digital marketing channels are systems based on the internet that can create, accelerate, and transmit product value from producer to the terminal consumer by digital networks.