If you are selling your home there are a few things you have to do. One of those things is post the listing online along with SO. MANY. OTHER listings. How are you going to make your listing stand out among all the other homes in the area for sale? You only have 5 seconds to catch their attention before they move on to the next listing.
Be sure your agent uses a professional photographer to photograph your home for sale and not just their cell phones! If your listing it as a for sale by owner, you too need to use someone who knows the angles, who knows the lighting and who knows how to make your listing more dynamic online!