It's a great idea to add photos or videos - research shows that they drive more traveller engagement with your listing page. Add photos or videos to your listing through the Management Centre. If you haven't yet registered for the Management Centre, visit www.tripadvisor.com/Owners to get started.
Once you're logged in, select the "Manage your TripAdvisor page" link. Then select "Add/update photos" or "Add/update videos" and follow the instructions on either page to upload your materials. You can also return to this page to manage your photos or videos later. Want more detailed instructions? Check out this guide for more information on uploading photos and this one for instructions on how to create promotional videos.