Wikipedia namespaces
Basic namespaces		Talk namespaces
0	Main	Talk	1
2	User	User talk	3
4	Wikipedia	Wikipedia talk	5
6	File	File talk	7
8	MediaWiki	MediaWiki talk	9
10	Template	Template talk	11
12	Help	Help talk	13
14	Category	Category talk	15
100	Portal	Portal talk	101
Virtual namespaces
-1	Special
-2	Media

The Help namespace is a namespace consisting of Wikipedia pages whose titles begin with the prefix Help:, such as Help:Link.

These pages contain information intended to help use Wikipedia or its software. Some of these pages are intended for readers of the encyclopedia; others are intended for editors, whether beginning or advanced. Some of the pages in the Help namespace are copied from Meta-Wiki.

There is a large amount of overlap between the Help namespace and the Project namespace (pages with the Wikipedia: prefix). For this reason redirects and hatnotes are often set up between these two namespaces.