We’ve all seen the ads that Google runs on top of and along side our searches. Many of us work on placing those ads for our clients and our businesses. Those paid ads generate over $30 billion every year for the search giant. Keep in mind the entire Adwords system of buying keyword search term advertising is a giant auction. You might pay $2 a click to be the top in your term today, but tomorrow a competitor can bid higher and move you down the page or even onto subsequent pages if you aren’t paying close attention. With the top result getting close to 40% of the clicks, maintaining position in a competitive arena is both time consuming and possibly expensive. Which keywords are the most expensive? The people at WordStream created an infographic showing us the top categories and keywords.