PhotoRoom is a mobile app that allows users to create product and portrait pictures using just their phone. It provides tools to remove backgrounds, change backgrounds, retouch images, add text to photos, resize images, and generate instant shadows. It caters to various industries such as clothing & apparel, beauty, furniture, jewelry, film, and entertainment.

To use PhotoRoom, simply download the app on your phone. Open the app and select an image from your gallery or take a new picture. Use the 'Remove Background' tool to automatically remove the background from your image. You can also use tools like 'Instant Backgrounds' to generate realistic backgrounds, 'Retouch' to remove unwanted parts of the image with a swipe, 'Blur Background' to blur the background automatically, and 'Add Text to Photo' to add text. Once you're satisfied with the editing, you can save and share your final image.