It's a way of measuring the leading life insurance companies.
There are several factors you may want to consider when comparing life insurance carriers.
Some rankings may measure an insurer's financial stability, total assets, total number of individual life insurance policies issued, or customer service, among other factors.
Some organizations like the Insurance Information Institute issue reports on the leading life insurance companies for a specific year which issued the most life insurance policies.
In addition, financial rating services like AM Best Company release reports on the life insurance companies by highest financial strength rating.