It is easy to store and serve - you can simply fill the bowl and leave it out for free feeding throughout the day. Oh, and it's cheaper than canned food. Most cats are not very impressed with the taste and show a clear preference for moist food. Another consideration is the low water content, which may lead to a decrease in the daily intake of water. Cats that are prone to problems of the urinary tract may be adversely affected by the lack of water.
Canned food is processed moist food that comes in a great variety of flavors, textures, and shapes.
Most cats find this kind tastier than dry food. Because the main ingredient is water, cats consume a larger volume of food. This also means a generally larger intake of water, which is an advantage for cats that don't like drinking very much. It's also easy to store, and the cans last for years on the shelf. However, canned food has its limitations.