Internet marketing, also known as digital marketing, web marketing, online marketing, or e-marketing, is the marketing of products or services over the Internet.

Internet marketing is sometimes considered to be broad in scope[citation needed] because it not only refers to marketing on the Internet, but also includes marketing done via e-mail and wireless media.[citation needed] 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, email marketing, and Web 2.0 strategies.

Internet marketing is associated with several business models:

• E-commerce: In this model, goods are sold directly to consumers (B2C), businesses (B2B), or from consumer to consumer.
• Lead-based Websites: A strategy whereby an organization generates value by acquiring sales leads from its website.
• Affiliate Marketing: The process in which a product or service developed by one entity (e-commerce business, single person, or a combination) is sold by other active sellers for a share of profits. The entity of the product may provide some marketing material (sales letter, affiliate link, tracking facility); however, the vast majority of affiliate marketing relationships come from e-commerce businesses that offer affiliate programs.
• Local Internet Marketing: Strategy through which a small company utilizes the Internet to find and nurture relationships that are to be used for real-world advantage. Local Internet marketing uses tools such as social media marketing, local directory listing, and targeted online sales promotions.
• White hat Marketing: This form of Internet marketing follows all of the acceptable practices for the search engines.
• Gray hat Marketing: This is when the practices are not specifically deceptive or abusive but lie in an area not specifically defined blackhat but still not entirely white hat.
• Black at Marketing: This is a form of Internet marketing that employs deceptive, abusive, or less than truthful methods

Read more: http://www.googleplacesoptimization.org/search-engine-optimization-education/what-is-internet-marketing/