NEW YORK (TheStreet) -- Shares of Zillow (Z) have enjoyed a tremendous 2013, up 180%. Discussing the company with TheStreet's Debra Borchardt is CEO Spencer Rascoff. 

Since the company's IPO two years ago, Rascoff said his biggest lesson has been to not focus on the share price. 

Focusing on the product and customer experience will ultimately take care of the stock, he added. 

After going public, Rascoff was forced to view his company more objectively from an outside perspective, which he called an "underappreciated benefit."

He went on to say that the company is in "investment mode, not in profit-maximization mode," referring to its increasing expenses.

The expenses have mostly come from increased recruiting, advertising and product development. 

Rascoff added that when the company starts to do $500 million in revenues, investors can expect 30% to 40% in EBITDA margins, which are currently in the single digits. 

Regarding the housing market, he suggested that home prices should continue to climb, albeit, at a slower pace than we've recently experienced. 

Homeownership is around 62% he said, slightly below the average of 65%, leaving some upside potential for continued home buying. 

Rascoff concluded that the company's focus would remain on mobile. Two years ago, 20 homes per second were viewed on a mobile device. Now, 120 homes per second are viewed on a mobile device, which is responsible for 60% to 70% of Zillow's traffic.

-- Written by Bret Kenwell in Petoskey, Mich.

Bret Kenwell currently writes, blogs and also contributes to Robert Weinstein's Weekly Options Newsletter. Focuses on short-to-intermediate-term trading opportunities that can be exposed via options. He prefers to use debit trades on momentum setups and credit trades on support/resistance setups. He also focuses on building long-term wealth by searching for consistent, quality dividend paying companies and long-term growth companies. He considers himself the surfer, not the wave, in relation to the market and himself. He has no allegiance to either the bull side or the bear side.