Its a dying and outdated term. Websites
are being replaced at the top of the serps by directory sites. Which goes against much of what google sites as good "seo" relevant content ect ect ive seen categories in directories with not even a listing ( which is a copy from another website, also bad seo ) Outrank websites with content. Google is making this shift to force website owners into adwords. It is the future unless you are prepared to sit inside a directory with 20 of your competitors alongside you.