It is a strong impulse learned in the nuclear family to teach others so that they may grow. In my view, it is this impulse that leads folks to contribute to Wikipedia, to essentially provide free software support or customer service to producers through user forums, and to share practical tips and knowledge through all manner of blogs. Taken together, all of this advice and sharing of practical knowledge forms the "How To" web.
(Of course, sometime this exercise comes off the web. At Campus Party 2009, Patricio Lorente of the Wikimedia Foundation taught a group of astronomers f2f at Campus Party 2009 how to create a Wikipedia entry.)
A case in point is the growth of video blogs or posts to YouTube that provide all manner of instructional video. While in Columbia, I had the good fortune to get to know Txaber Allue Marti, otherwise known in the Spanish-speaking world as El Cocinero Fiel (the funky cook). Living in Spain, but increasingly engaged in gastronomic tourism, Txaber's video blog is essentially an interactive cooking show hosted on YouTube. An important part of his success is that he interacts with his audience through the comment feature. He also posts his blog under a Creative Commons license.
Having been an occasional viewer of television cooking shows, I find Txaber's videos refreshingly direct and fun. In part, he makes the food the star of the videos, not the cook.
Below is Txaber, Carolina Botero (Creative Commons Colombia), and Patricio.