Search engine marketing (SEM) is the process of promoting your websites through paid text ads that appear on the results pages in search engines such as Google, Yahoo and MSN.
To determine when your paid text ads appears in search engine results, you must select desirable keywords and keyphrases, and bid against competitors to determine which ads will appear. The order ads appear is influenced by bidding, relevance and other factors.
Launching an effective SEM campaign is a three-step process: