Although the Cash for Clunkers deal has many people looking for a new car, the used car market is still booming in this down economy, and one used car website says a significant portion of its traffic comes from search engine optimization (SEO).

For years Kelley Blue Book has been the guide for car shoppers looking to find the price of a new or used car, but with a number of other car sites online, the company is hoping to regain its brand recognition online with its website – kbb.com.

Currently the website gets about 13 million unique visitors each month and Justin Yaros, executive vice president of product design and development tells MediaPost’s MarketingDaily that much of that comes from organic search.

"Right now about a third of our traffic is direct to our site, a third comes through search-engine marketing and a third of our volume is through search engine optimization," he said.

It helps that kbb.com has original content on its site which can boost both search engine optimization (SEO) and branding, according to Mark Jackson in a recent piece for Search Engine Watch.

In the article, Jackson says even small businesses can take a page out of the marketing playbooks of big companies by creating original, compelling content on their sites – through news, blogs or press releases – which will also increase search engine optimization (SEO).