Classifies ads web business is very profitable, easy to maintain and is one of the most sought out internet business. Before setting up an online classified ads business site, first you have to decide what category of classifieds you will build (for example an auto classifieds, a pet classifieds, an art and antiques classifieds, and so on). Then you have to decide how the user can post ads (free ads or paid ads). Next you will have to decide how you want your classified ads site to look like and what features to include, how much money you want to invest in this project etc.