There has always been an element of mystery to bidding for keywords on Google AdWords.  Finally, Hal Varian from the mighty Google speaks out on our behalf with this clear and concise video to explain exactly what happens when you bid on a keyword and how the ads are ranked.  If you haven’t seen this video yet, you need to take the 9 minutes and 12 seconds it takes to watch it.  If you spend any money on Google AdWords at all, it will be worth it.

See, I told you so!  Now go make some money.