As an unique User, you can specify "personal criteria" or your own unique default search criteria on each page. This message indicates which default criteria was used to set the search criteria on this page. There are:
Internal criteria which are hard coded in the software as a default
Site criteria which are established by the Webmaster as a default
Personal_n criteria which are up to 4 criteria that you can set to use for your searches
You can toggle through these criteria by clicking on the icons:
Page criteria criteria are also set when hyperlinking into a page. These are called "Linked Criteria" and they are hard coded in the software.