Internet marketing, also referred to as i-marketing, web-marketing, online-marketing or e-Marketing, is the marketing products or services over the Internet. The interactive nature of Internet marketing in terms of providing instant responses and eliciting responses are the unique qualities of the medium. Internet marketing is sometimes 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. Management of digital customer data and electronic customer relationship management (ECRM) systems are also often grouped together under internet marketing. Internet marketing ties together creative and technical aspects of the Internet, including: design, development, advertising, and sales.

Internet marketing also refers to the placement of media along many different stages of the customer engagement cycle through search engine marketing (SEM), search engine optimization (SEO), banner ads on specific websites, e-mail marketing, and Web 2.0 strategies. Internet marketing is relatively inexpensive when compared to the ratio of cost against the reach of the target audience. Internet marketers also have the advantage of measuring statistics easily and inexpensively. The nature of the medium allows consumers to research and purchase products and services at their own convenience. Online advertising techniques have been dramatically affected by technological advancements in the telecommunications industry. In fact, many firms are embracing a new paradigm that is shifting the focus of online advertising from simple text ads to rich multimedia experiences. As a result, advertisers can more effectively engage in and manage online branding campaigns, which seek to shape consumer attitudes and feelings towards specific products. The targeted user is typically browsing the Internet alone therefore the marketing messages can reach them personally. This approach is used in search marketing, where the advertisements are based on search engine keywords entered by the users, now with the advent of Web 2.0 tools, many users can interconnect as "peers."