Public records are bascially files which the government make about you, at certain times of your life. When something 'official' happens to you, such as you file for bankruptcy, or get divorced, the government will create a file explaining what happened. Although this might seem intrusive, it's a great way to find out the truth about people's backgrounds.. but in order to do that, you need to be able to find their public records first.
Getting information about someone's past is all about finding the most public files about them. The problem is that public records aren't kept in a single location. They are spread all around the country, and are stored where they were created. So if someone was born in Texas, they'd have their details stored there. However, if they then went on to commit a crime in Florida, the conviction papers would be stored there, too.
This means that if you want to find all the public information about someone, you used to have to go round all the different court houses and police stations, trying to find their records. This not only took a lot of time, but it was also unreliable, because you simply didn't know if you had the right person's details, or not.
Luckily, there is a much easier way of finding people's records. Thanks to the Internet, we now have the ability to find out someone's entire public history, just from one search. Sites such as Public Records Pro actually bulk-buy all the public records they can find. They then put them all into a central database, which you can search with their name.
Because these sites have been designed to be as transparent as possible, they are incredibly reliable. In fact, Public Records Pro actually shows you who you're getting information for, by showing you a list of people with the name you just searched for in a list, with their addresses. You then pick the person you want, and then it shows you all the public information they have for them.