We do run article directory for career articles, so you can call our directory as a niche directory. And yes, there are some benefits when using nice directory, the links from niche directory tend to be more valuable and the traffic you get from them is usually very targeted.
A niche directory is only about one topic like cars or books will only accept sites with content of that nature. A general directory will accept websites with any kind of content.
hm i was also wondering about the meaning and purpose of such directories well i muct say that they are very good tool of increasing the traffic on your web
Niche Directory means U have to submit your site related to your site category only ..Theme Based directory. Google gives more important's to niche directory then general directory. For Example: Your site is related to Real Estate then find Real Estate Directory and submit in it.