There're plenty of great ways to get traffic, especially this off-site optimization technique using classified ads to point website traffic back into your site itself.
There are two main sites out there in the classified web world that really speak highly to Google and build a lot of relevance to Google and Yahoo, as well and also MSN/Bing as they move to a more dynamic platform. These two directory/classified websites, the reason I say directory is all the information on the classified websites are very well organized. You have Craigslist and then you also have Backpage.
The strong components about these websites is that you can check a website called Alexa.com and see that Craigslist is in the top 25 websites in the world, which means that if consumers are going to Craigslist at such a high rate that it makes the top 25 list, then its sure got to be a great place for the search engines to go for information. .
Then there's Backpage, which we see pop up in the Yahoo index very frequently, and this will also index you and case you within the organic search engine optimization rankings. Now when you write these particular ads, what you'll want to do is assign a physical address in the ad if you have a physical location. This helps build your relevancy in the maps area of the search engines and then you'll also want to hyperlink content within your classified ad relevant to your business.
For example, we're a Fort Lauderdale based SEO firm, so I would actually hyperlink content that said "Fort Lauderdale SEO" and point it to "www.SEO.cc" and this will build relevancy toward Fort Lauderdale SEO and then ideally we will place our physical address, 4 West Las Olas Blvd, Fort Lauderdale, Florida 33301, giving the search engines even more rich data information to place it back into their indexes just by three simple postings on Craigslist and Backpage websites. Very well organized classified websites for valuable backlinks.