A web directory is a collection of web sites which are organized into different niche categories and sub-categories, usually by a human editor who will scrutinize the listing before approving it into the directory. The difference between directories and search engines is that all web sites in a directory are selected by hand after undergoing various review criteria, whereas search engines use softwares to automatically index the web pages with no regard for quality. Thus this means that a web directory is a biggest source for the searching and browsing through the best web resources.
A web directory can also be focused on a general collection, or it may also be a niche directory which collects a good list of blogs sorted by categories, or what one may refer to as a blog directory. Blogs have always been an ultimate source for getting some of the best information, therefore it is a good idea to collect them into a directory. A good example of this type of directory is the Alive Blog Directory, which is a quality directory with high traffic containing various blogs for you to look up. So do not forget to check out this directory in order to subscribe to the many famous blogs that regularly post something new.