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These types of services have been around for over 150 years, as good as Google is and as comprehensive as the searches can be, not all of the information that is printed in the newspaper can be found online. A typical example of this is advertisements. Hospitals continue to advertise in the hard copy of the newspaper. So to track these advertisements a newspaper clipping service is necessary to gather all of the media from the print version of the newspaper. Press Clipping Services continue to thrive as online media differs from traditional print media by more that 80%.
Here is a list of all of the Newspaper Clipping Services that continue to operate and belong to an organization called the NACPCS http://www.nacpcs.com
There are additional services run by The Associated Press, and other state press association, all over the country.