They provide a service to the general public and others, for several purposes.J&RTo gather information, that you may require and also compare things to each other to name but a few.
In order to make money, these companies must use marketing. Very rarely will a company do anything for free, especially if that is their sole business.
Internet marketing can open your buisness to a whole new world of customers that television, radio, and bill boards just would not reach. There are lots of people that do nearly everything online now