What is the website that tells you who has googled you?

Since such websites are really few to figure out "who is looking for me" online, I came to know about this really cool website http://www.whosearchingforme.com. One can create their account on the site and under few easy steps you can find just about anyone available on site all across U.S. What's more, one can also receive alerts to know who is "searching for me" online. I recommend go for it as features and usability on site are just incredible.