Why is Google important?

Search engines are not new. Google was not the first to appear in the market of search engines either. I am no search expert but what I hear, the algorithms used in google search is not the best either. Then why is Google is what it is today? Why is Google so important as a company and for the future of the software industry? Two things - Its simplicity and its ability to change other's momentum. It has awaken a sleepy Yahoo. It is forcing Microsoft to scan libraries. It is forcing it to provide online softwares. Its making MSN search to get better. As Sun forced IBM to revamp itself during the dot-com boom and as its burst changed Dell's strategy, Google is a very important event changing the face of the software industry.