A blog is an online journal or diary, a place where you can regularly write about anything that interests you. Other web surfers can add comments to articles you have written (these can be anonomous users, or they have to be registered to post). For help to set up a blog, ask for a blog quote now, and get blogging.
The internet is an incredibly large collection of computers that are connected to each other with the ultimate purpose of sharing information. To break it down with a simple example:
You have a document on your computer that you would like your neighbour to read. By connecting a cable from your computer to theirs, you can pass the document across this pipe, directly to their computer. In this way you have created a network.
Planet Drupal aggregates drupal related blog posts from a number of drupal sites and bloggers. I've only recently discovered it, but have already found some incredibly useful drupal posts here. For example, this one shows you how to allow "everyone, including “anonymous users”, to be informed of updates to nodes right inside their content", something very similar to what a client has just asked me to do.
