Our website is a vertical classified ads website, entirely dedicated to the sale of sailing boats, motor boats, dinghies and jet skis. The listings of boats offered for sale are inserted either by professionals (who pay an annual subscription) and by private users (who can publish free ads). The website generates a total of about 30,000 visits a month, but we believe that the organic traffic will grow substantially, so we would like to find a professional who can suggest what action to take and how to change the code of our website in order to improve indexing on search engines (Google).