The Fool is exploring Seattle. Today, CEO Spencer Rascoff introduces us to Zillow  (NASDAQ: Z  ) , telling us how the online home and real estate marketplace works, what he considers its greatest strengths, and what investors should know about it.

Spencer recounts how the idea for Zillow was born of his time at Expedia, and how far the company has come since then. He also offers some insight on what investors should look for when evaluating any tech company.

The Real Estate Market Meets the Internet: How Zillow Came to Be (Z).