Internet marketing services in Northbrook are also known as digital-marketing, web-marketing, online-marketing, search-marketing or e-marketing. Internet marketing services can be defined as the marketing or promotion of products or services over the Internet. In Northbrook, this is considered to be broad in scope because it not only refers to marketing on the Internet, but also includes marketing done via e-mail and wireless media. Digital customer data and electronic customer relationship management (ECRM) systems are also grouped together under internet marketing. Internet marketing ties together the creative and technical aspects of the Internet, including design, development, advertising, and sales through its applications.