Knowing what file format to use can make a huge difference. In certain cases you want to use a certain file format to save the work you've done. Different file types are used for different programs and different types of work.
Beer is great and pizza is amazing, but when you have both at the same time it’s one of the best meals known to man. Still, the subtle, nuanced flavors of different beers can be even better with the right pizza pairing.