Life insurance is a contract where an insurer agrees to pay a designated beneficiary a sum of money upon the death of the insured. Key features include the payment of regular premiums by the policyholder and a lump sum payment to beneficiaries. The process involves filling out an application, providing proof of age and medical examination, and acceptance by the insurer. Life insurance provides financial protection for dependents and encourages savings. It has an economic nature by providing for a family's needs and a legal nature as defined by law. Characteristics include insurable interest of beneficiaries and utmost good faith of both parties.