At SMX advanced in Seattle the question was put to the attendees: “how many of you use bid management tools?”

And that was the most surprising part of the session: nearly everyone in a room with hundreds of people raised their hand. Of course technically speaking using Excel to increase your prices by 10% also makes it a bid management tool. Nevertheless people in the industry seem to take bid management really seriously - as they should. I couldn’t help shake the feeling though that the panelists conveniently touted all the wonders of bid management without touching on its many shortcomings. Only David Rodnitzky from PPCAdBuying.com played the devil’s advocate and warned against the dangers of being sold an expensive, complex system that may not actually offer a return on investment.

I have to agree with David that bid management tools often over-promise and under-deliver and for a very simple reason. bid management makes sense for large PPC campaigns where it is unwieldy to set prices manually. But it is exactly for those large campaigns that the data you have available for each keyword is very sparse. Long tail keywords may contribute a significant portion of your revenue but by their very nature each individual keyword gathers information in a fairly random manner. No matter how smart your bid management system, it cannot make assumptions from data that doesn’t exist. To get around that most system group long tail keywords in clusters and aggregate their data. How you cluster the data though will greatly influence of the system and as far as I know there is no one optimal way of doing it.

A comment made by search marketing veteran Kevin Lee (and with which other panelist Chris Zaharias from Omniture agrees in spirit) also illustrates another difficulty faced by automated bid management. Kevin said that half of the paid ads in top positions are put there by idiots, not rational beings. How would a bid management system incorporate the behaviour of an irrational market into its decision making algorithm?

When choosing a bid management system be careful not to over-complicate things. For small to midsized campaigns you probably don’t need any fancy systems. Choose a tool that is flexible and that lets you override its bid adjustments. That way you can control for events such as special promotions or sudden increased competition in the market. And remember, bid management tools are only an aid, not a solution.