What is Yahoo People Search? How it is Work?

People search on Yahoo was a utility that could be used to find phone numbers, addresses, and email information of real people. At that time the search engine was accessible through people.yahoo.com.
Some of the information on Yahoo people-finder was supplied by the Intelius which was an information retrieval company that used to license the data to Yahoo. 
However, most of the information shared was free on the platform but if you have to pursue the information of Intelius, you’d have to pay for the information.
The information found on the free people Yahoo search was found on publicly accessible databases, online phone books, and other publicly accessed records. So, there was no breach of anyone’s privacy here. The information was already available on the net, Yahoo made it easier for the users to access it.