A blog (a contraction of the term weblog) is a type of website maintained by an individual or group, with regular entries of commentary, descriptions of events, or other material.  See http://en.wikipedia.org/wiki/Blog for the Wikipedia definition & more.  Our blog can be used for whatever we want - whatever the need is.  It might be used to advertise local get-togethers, to sell stuff, organise a holiday trip, an invitation - whatever - we'll wait and see what pans out.