Search Engine Marketing, or SEM, is a form of Internet Marketing that seeks to promote websites by increasing their visibility in the Search Engine results pages (SERPs) and has a proven ROI (Return on Investment).

SEM methods include: Search Engine Optimization (or SEO), paid placement, and paid inclusion.

This form of online advertising entails embedding an advertisement into a web page. It is intended to attract traffic to a website by linking them to the web site of the advertiser. The advertisement is constructed from an image (GIF, JPEG, PNG), JavaScript program or multimedia object employing technologies such as Java, Shockwave or Flash, often employing animation or sound to maximize presence.

The most common form of this technique is known as "banner advertising"

Affiliate marketing is a method of promoting web businesses (merchants/advertisers) in which an affiliate (publisher) is rewarded for every visitor, subscriber, customer, and/or sale provided through his/her efforts.

Affiliate marketing overlaps with other internet marketing methods to some degree, because affiliates are using the same methods as most of the merchants themselves do. Those methods include organic search engine optimization, paid search engine marketing, email marketing and to some degree display advertising.

Email marketing is a form of direct marketing which uses electronic mail as a means of communicating commercial or fundraising messages to an audience.

- Sending emails with the purpose of enhancing the relationship of a merchant with its current or old customers and to encourage customer loyalty and repeat business.

- Sending emails with the purpose of acquiring new customers or convincing old customers to buy something immediately.

- Adding advertisements in emails sent by other companies to their customers.

- Emails that are being sent on the Internet (Email did and does exist outside the Internet, Network Email, FIDO etc.)

Interactive advertising affords the marketer the ability to engage the consumer in a direct and personal way, enabling a sophisticated and dimensional dialogue, which can affect a potential customer's buying decisions particularly in an e-commerce environment.

Perhaps one of the most effective implementations of interactive advertising is so-called Viral marketing. This technique uses images, texts, web links, Flash animations, audio/video clips etc., passed from user to user chain letter-style, via email.