There are two basic types of life insurance: term life insurance, which provides life insurance coverage for a specified period of time (the term), and cash value (permanent) life insurance, which combines a death benefit with a cash value component. Cash value insurance offers lifetime protection, while term insurance may be the most affordable option if you're buying life insurance mainly for the financial protection it offers, and your need for life insurance is temporary (until your children leave the nest, for instance). Some term policies (called "convertible") will permit you to exchange the term life insurance policy for a permanent one at some point.