A blog (=web log) is a website, which contains entries displayed in reversed chronological order; the latter posts come before the early ones. A blog can be written about specific topic, providing news and descriptions of specific events, it can also function as a diary, visible to everyone or to a number of people listed as "friends" of the blogger. 

 

An important function of a blog is providing an option to react on written entries by adding comments.An affiliate program blog is designed to help people interested in promoting affiliate programs. It gives information about those programs and describes the ways, in which you can gain money from different affiliate programs in the Web. 

 

Examples:

http://affiliatemarketingprograms.blogspot.com/

http://www.employment911.com/cs/blogs/affiliate-program-marketing/default.aspx

http://www.killeraffiliateprogram.com/