Usually, the term length is also an indication of how long the life insurance policy premium will stay the same price, for instance, 10 or 20 years.
But some term insurance policies guarantee the premium to stay the same (level) for only part of the term, for instance, only the first 10 of a 20 year term.
For example, a 20 year Term Life policy has a term length of 20 years. It may or may not be guaranteed not to go up in price for the full 20 year the life insurance coverage is "In Force". When the 20 years are done, the life insurance policy will end, or the premium will increase dramatically if you choose to renew the term life insurance coverage.
Learn more about how term insurance works.