Telephoto lenses are often said to compress the perspective of a scene, although it’s actually the physical act of moving backwards away from the scene you’re photographing that causes the perspective to change. The result is that objects a long way apart appear to be closer together or ‘compressed’, and their relative sizes become more uniform.
It might sound counter intuitive, but background compression can emphasise the size and scope of your surroundings. This style of photo can be extended to street photography. Buildings and people will be brought closer together, creating a bustling atmosphere. With a traditional wide-angle lens, the same scenes may feel empty as the distant subjects would be harder to pick out.