Too easy. Find the button and click ADD AN AD and follow the steps.
1.- Select a category (Cars, motorcycles, taxis, nautical, etc.)
2.- Select a FREE or PREMIUM package and the type of ad: Standard or Featured.
3.- Fill out the form with all the relevant information of your ad.
4.- Add photographs and videos. You can crop and sort just by dragging.
5.- Check your publication and confirm.
If you want more information, you can see the complete guide HERE