Online advertising is growing faster than any kind of advertising (including traditional print, radio, etc...) and search engine Pay Per Click (PPC) is poised to lead the online sector.
Online advertising in general and search engine PPC adverstising, have both grown into billion dollar industries in the USA alone. Average cost per click is also expected to rise as competition for keywords continues to grow. This may have an adverse effect on ROI. How do you chose your keywords?