Wanted to learn how to do anything?, What do you do next?, Oh yeah! search on internet (you Google It). Internet has become a place to find anything & everything. Did you ever wanted to set up a howto’s site on any of the favorite topics of your expertise to teach to the netizens? Google is making it easier by allowing you to book a new .How domain.
This makes it clear that the idea of Google is to bring educational sites under one roof, book your .how domain before someone else actually takes it.