When you stop to consider that search marketing has only been around about 10 years (counting the launch of GoTo.com as the birth date), the industry certainly has evolved quickly.
Instead of only one search engine, we now have at least four legitimate choices (YSM, Google, MSN, Ask), and that’s not including important niche players like Quigo, IndustryBrains, or Business.com.
Instead of one pricing model (cost per click), we also have cost per thousand (CPM) and cost per action (CPA or PPA).
Instead of one distribution option, we now have too many to count, with the big ones being search, content, print, radio, TV, mobile, social media, local, and international.

