The Food and Drug Administration (FDA) recommends that you eat five servings of fruits and vegetables every day. To get all those vegetables from fresh sources means spending a lot of time at your local grocery store or open-air produce market. A simple solution is to eat canned produce to fulfill some of that requirement.
Canned and frozen veggies lose some of their food value over fresh, but still retain a good percentage of their nutrients. Canned produce also has the advantage of being convenient and portable, and you can find canned vegetables year round that may only be available fresh seasonally. If you're saving your pennies, using canned vegetables in some of your meals is a great way to stretch your food budget too.