Choicepoint is a HUGE database with tons of information about Americans. They know something about everyone, all based on public records. They use this information in two ways. The first is through government: they work with the Homeland Security agency to prevent terrorism at home, and they help with criminal background checks for certain positions. The second way is through companies: they sell information to people who want to know that information.
In the case of a driving record, that could be for both ways. It could be so law enforcement knows if you have a bad record - it's easier for them to check up on you with the Choicepoint information. And whether you have a good OR bad record, they can sell that information to auto insurance companies. Some companies specialize in bad drivers, and they want to sell you insurance. And good drivers are popular too, so other companies want to sell you insurance too.