Online advertising is the fastest growing segment of any form of advertising. In the last 5 years alone, total advertising dollars spent on the Internet have almost doubled from 16 billion to a projected 30 billion for 2010.

Online advertising (also called Internet advertising or web advertising) continues to be so popular among advertisers, because any company can quickly reach a global audience while spending a lot less money in comparison to traditional offline advertising media.

Another benefit of online Internet advertising is the use of geo-targeting by city, state, zip code or even IP address. Advertisers can also choose when placing web banners or PPC advertising (like Google AdWords) to only have their ads seen on websites that have directly related (or relevant site content) to their own company’s product or service.

There are many types of online advertising. Some of the more popular Internet advertising vehicles include web banner ads, affiliate marketing, email marketing, search engine optimization, SEM marketing including PPC campaigns (Pay-Per-Click) like Google Adwords and the newest Web 2.0 (and soon Web 3.0) interactive advertising and mobile advertising.