SEA (Search Engine Advertising) is advertising on the search engines. An extensive list of keywords is assembled and if one of those keywords is entered in the search bar, ads appear.

As an advertiser you only pay when a potential customer clicks on your ad and is brought to your website so you pay per click. The most important pay-per-click networks on which you can advertise are:

1. Google AdWords
2. Yahoo! Search Marketing
3. MSN AdCenter

Why should you prefer search engine advertising over other marketing channels?