Term life insurance is an individual life insurance policy purchased by an individual on one life.
Whereas, a group life insurance plan is coverage for an entire group of people, usually those who work at the same company.
You do not own the group coverage, it only stays with you while you are employed by the employer providing the group plan.
Whereas, you may own your own individual term life insurance policy, pay the premiums, and have coverage on yourself.
Learn more about term life insurance vs group life insurance.