All about webcatalogues & Backlinks:

A web catalogues is a collection of web addresses(URL's) - the web pages which are sort according to certain criteria / categories. Most web catalogues are checked by hand, are maintained and sorted. With it they are also differ in the first row from Searching machines. Not seldom passed, if you a searching word give in searching machine, will search for millions of web pages and even more scrap metal listed only not what you actually need. The advantage of a web catalogue is, that you can optimise some own entries like searching words and description for respective categories. In the final effect a potential viewer of your web page can find better and quicker what he want.
With an entry in the web catalogue you get a so-called Backlink to your Website. With it your web page is listed once more also to all customary searching machine service providers and of course the value of your web page increases.
The value of a web page is classed after a so-called Pagerank from 0 to 10, where 10 are the highest assessments. The mostly visited and the very well valued web page have not seldom X thousand backlinks and are to be relatively easy to found with various searching words in searching machines.