"Eggs are an easy and inexpensive source of protein with at least 9 amino acids. In general, eggs contain almost all vitamins (except for C) with high levels of all B vitamins, and a good source of folate, A, D and E. Eggs provide a high source of the nutrient choline, which is important in the regulation of the nervous system, brain and cardiovascular system. Eggs are also a rich source of many essential minerals."
There may be some confusion when it comes to the quality of certain eggs. Just because there is a special "organic" or "free range" stamp on the packaging, it doesn't necessarily mean what we might think it does. Here's an article that explains what the legal definitions are for those trendy yet deceiving terms such as: organic, free-range, and cage-free.