Compressed gases are gases that are stored under high pressure in a container, which reduces their volume. This process allows for more gas to be stored in a smaller space, making it easier to transport and use. Common examples of compressed gases include oxygen, nitrogen, and carbon dioxide. These gases are used in various applications, such as in medical settings for breathing support, in industrial processes for welding, and in recreational activities like scuba diving. Proper handling and storage of compressed gases are essential to ensure safety, as they can be hazardous if not managed correctly.