What is voluntary term life insurance?

Usually it is a life insurance plan offered through your employer to provide employees with an opportunity to purchase life insurance coverage through work, and the premiums may be payroll deducted.

In some cases, voluntary group life insurance plans offer life insurance coverage at a higher cost, but with fewer health questions and no laboratory testing. 

It's important to keep in mind when considering life insurance that the more health questions they can ask, the cheaper the cost will be for a healthy person, usually.

That doesn't mean Voluntary life insurance is a bad idea, it means you may find cheaper life insurance coverage elsewhere.

For instance, it may be more affordable to buy your own personal term life insurance policy which offers the benefits of choosing the amount of life insurance coverage you need, for the period of time you need coverage, and you can keep the life insurance "In Force" even if you leave your current job.