Whey protein is an excellent source of protein for the health-conscious and fitness-minded person. Whey protein is often used as a source of protein for the purpose of building muscle. Since it is a healthy source of protein - ie, low in fat and carbs - many body builders will consume nearly pure whey protein directly after a workout to aid in rebuilding muscles without consuming very many calories.
Whey protein is available in a number of products. The most common one is probably in the form of Protein bars, of which there are many. Protein bars come in a wide variety of types, some of which are not as healthy as one might think after adding a bunch of sugar or fat to make the bar taste better. Protein bars containing whey protein should be chosen based on their fat and sugar content- lower fats and sugars may not taste as good, but they will actually accomplish the job of helping you get or stay in shape, instead of doing the opposite!
Whey is also available in many shake-style drinks, whether in liquid form or in powder meant for mixing into a shake or drink. The "best" version of these are literally raw whey protein powder that can be mixed with water to create a drink.. these are the best possible way to consume whey, but don't expect a great tasting concoction.. raw whey protein powder can fall between tasteless and really bad, depending on the taste opinion of the consumer. Many options exist though which make strike a good balance between healthfullness of the drink and good flavoring. Some drinks are even good enough, without adding too many calories, to actually be considered good tasting. Read more about whey protein shakes.