The document provides instructions for adding images to a gallery on a new Umbraco dance studio website. It outlines uploading images to the media folder, creating a new gallery, naming and selecting a single image for the gallery, and saving and publishing the image so it appears in the media gallery. The steps are to login, go to media and upload photos under 900px, go to content and right click to create a new gallery, name and select a single image, choose the image, pick the item, and save and publish.