Internet marketing is associated with several business models:
• e-commerce — goods are sold directly to consumers (B2C) or businesses (B2B),
• publishing — the sale of advertising,
• lead-based websites — an organization generates value by acquiring sales leads from its website, and
• affiliate marketing — A process in which a product or service developed by one person is sold by other active seller for a share of profits. The owner of the product normally provide some marketing material ( sales letter, affiliate link, tracking facility).
There are many other business models based on the specific needs of each person or business that launches an Internet marketing campaign.

One-to-one approach
The targeted user is typically browsing the Internet alone, so 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 user.
And now with the advent of Web 2.0 tools, many users can interconnect as "peers."
Appeal to specific interests
Internet marketing and geo marketing places an emphasis on marketing that appeals to a specific behaviour or interest, rather than reaching out to a broadly-defined demographic. "On- and Off-line" marketers typically segment their markets according to age group, gender, geography, and other general factors. Marketers have the luxury of targeting by activity and geolocation. For example, a kayak company can post advertisements on kayaking and canoing websites with the full knowledge that the audience has a related interest.
Internet marketing differs from magazine advertisements, where the goal is to appeal to the projected demographic of the periodical. Because the advertiser has knowledge of the target audience—people who engage in certain activities (e.g., uploading pictures, contributing to blogs)— the company does not rely on the expectation that a certain group of people will be interested in its new product or service.
Geo targeting
Geo targeting (in internet marketing) and geo marketing are the methods of determining the geolocation (the physical location) of a website visitor with geolocation software, and delivering different content to that visitor based on his or her location, such as country, region/state, city, metro code/zip code, organization, Internet Protocol (IP) address, ISP or other criteria.
Different content by choice
A typical example for different content by choice in geo targeting is the FedEx website at FedEx.com where users have the choice to select their country location first and are then presented with different site or article content depending on their selection.
Automated different content
With automated different content in internet marketing and geomarketing the delivery of different content based on the geographical geolocation and other personal information is automated.
Advantages
Internet marketing is relatively inexpensive when compared to the ratio of cost against the reach of the target audience. Companies can reach a wide audience for a small fraction of traditional advertising budgets. The nature of the medium allows consumers to research and purchase products and services at their own convenience. Therefore, businesses have the advantage of appealing to consumers in a medium that can bring results quickly. The strategy and overall effectiveness of marketing campaigns depend on business goals and cost-volume-profit (CVP) analysis.
Internet marketers also have the advantage of measuring statistics easily and inexpensively. Nearly all aspects of an Internet marketing campaign can be traced, measured, and tested. The advertisers can use a variety of methods: pay per impression, pay per click, pay per play, or pay per action. Therefore, marketers can determine which messages or offerings are more appealing to the audience. The results of campaigns can be measured and tracked immediately because online marketing initiatives usually require users to click on an advertisement, visit a website, and perform a targeted action. Such measurement cannot be achieved through billboard advertising, where an individual will at best be interested, then decide to obtain more information at a later time.
Limitations
Internet marketing requires customers to use newer technologies rather than traditional media. Low-speed Internet connections are another barrier: If companies build large or overly-complicated websites, individuals connected to the Internet via dial-up connections or mobile devices experience significant delays in content delivery.
From the buyer's perspective, the inability of shoppers to touch, smell, taste or "try on" tangible goods before making an online purchase can be limiting. However, there is an industry standard for e-commerce vendors to reassure customers by having liberal return policies as well as providing in-store pick-up services.
Security concerns
Information security is important both to companies and consumers that participate in online business. Many consumers are hesitant to purchase items over the Internet because they do not trust that their personal information will remain private. Encryption is the primary method for implementing privacy policies.
Recently some companies that do business online have been caught giving away or selling information about their customers. Several of these companies provide guarantees on their websites, claiming that customer information will remain private. Some companies that purchase customer information offer the option for individuals to have their information removed from the database, also known as opting out. However, many customers are unaware if and when their information is being shared, and are unable to stop the transfer of their information between companies if such activity occurs.
Broadband-induced trends
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. And just what is the critical technological development that is fueling this paradigm shift? The answer: Broadband.
CBO