Life insurance plans are sometimes provided by employers for their employees as a form of employee benefits.
Employer provided life insurance is also known as group term life insurance.
With group term life every employee may be covered by the group life insurance policy, and each employee may be given a certificate of coverage.
Usually, each employee has at least 1 times their annual income in coverage. So, if you earn $50,000 you may have $50,000 of coverage from your group term life policy.
Usually, the group term life benefit is paid for by the employer. And, you may be able to add additional coverage by request if you pay the additional premium for the increase in your coverage.
Keep in mind, if you lose your job, or are no longer employed for any reason, you would lose your life insurance provided by your employer. However, some plans allow you to convert your group term life coverage into an individual permanent life insurance policy for an increase in premiums - you would pay for the policy yourself.
That's why it's a good idea to have your own individual life insurance plan separate from your employer provided life insurance.