First: Access your account by clicking the "Sign in" button at the top of the page
Second: After logging in, click the "Add New Ad" button.
Third: Select the main section and then the subsection that represents your ad
Fourth: Choose your city or your nearest city
Fifth: You will see the ad extension form, fill out the ad information (advertisement subject, place, details and upload a picture if possible) and click on the button "Save and Publish Ad"
Access to the page referred to below has successfully completed the process.