Internet marketing, also referred to as online marketing, Internet advertising, eMarketing (or e-Marketing), is the marketing of products or services over the Internet. When it applies to the subset of website based ad placements it is commonly referred to as Web advertising (Webvertising), and/or Web Marketing. The Internet has brought many unique benefits to marketing including low costs in distributing information and media to a global audience. The interactive nature of Internet marketing, both in terms of instant response and in eliciting response, are unique qualities of the medium.

Internet marketing ties together creative and technical aspects of the Internet, including website design, development, advertising, and sales. Internet marketing is neither only about building or promoting a website over the internet, nor does it mean placing a banner ad on another website and free directories & classifieds. Effective Internet marketing requires a comprehensive strategy that synergizes a given company's business model and sales goals with its website function and appearance, focusing on its target market through proper choice of advertising type, media, and design.