Find out what people are looking for on backpage.com. For example: "bartender" is the most popular job search in Dallas and Astoria is a popular search for an apartment for rent in New York City. About 15% of users search. It makes sense to check the popular searches link at the bottom of any category you plan to post. You can then write better posting for searches on backpage.com and for searches on Google. Please avoid stuffing your postings with keywords since they will get removed.
This feature is alive across all bp markets. Check it out for yourself.