A thirty-year term life insurance policy covers you for 30 years. If you die before the term is up, your beneficiaries receive a payout in the amount of the policy face value.
How do you decide what kind of insurance to buy? That is based on your needs and that of your family. A 30 year term policy is good if you take out the policy when you first get out of school because when it is paid in full, you will still be young enough to take out another policy without having to pay an exorbitant amount because of your age. If you take it out when you are past 30, you have to keep in mind that when you finish paying on it, you will be past 60, and thus unable to obtain reasonably priced insurance because of your advanced age. At that point, you may want to think of a 20 year term policy so that you can still obtain a policy to replace it at a reasonable cost.
Level Term policies are no-frills policies. They have no cash value or dividends, thus the reason they are cheaper than whole life policies. A thirty-year term policy is an excellent choice for supplementing an employers insurance policy if they do not offer voluntary life insurance as well. The choice of term works in well for retirement, especially if your company is on a 30-year program. It is also well suited to the parent who wants to provide their children with something until they get out of college and become established in their careers.
Term life insurance has many different options from which to choose, but the 30-year term (thirty-year) works best in most situations -- especially if you are fairly young, let's say, any age under 40, or you need mortgage protection.
It is important to look at your individual situation and decide what is best for you - a cheap policy is not always best the best. You want to make sure to do some research and obtain quotes from several different insurance companies because some offer options that others do not, and those options may be important to you. Take the time to do the research, and you will find that you will be much happier with your decision.