Internet marketing, or online marketing, refers to advertising and marketing efforts that use the Web and email to drive direct sales via electronic commerce, in addition to sales leads from Web sites or emails.
Specialized Areas of Internet Marketing:
Internet marketing can also be broken down into more specialized areas such as Web marketing, email marketing and social media marketing:
1) Web marketing includes e-commerce Web sites, affiliate marketing Web sites, promotional or informative Web sites, online advertising on search engines, and organic search engine results via search engine optimization (SEO).
2) Email marketing involves both advertising and promotional marketing efforts via e-mail messages to current and prospective customers.
3) Social media marketing(SMM) involves both advertising and marketing (including viral marketing) efforts via social networking sites like Facebook, Twitter, YouTube and Digg.
In Online Advertising it is the percentage of visitors who take a desired action (e.g. make a purchase or click an ad).