A Facebook Page is a public profile for a business or product. It’s easy to create a page, it’s very similar to setting up a personal account. You’ll want to have a name in mind, description and maybe some photos. A good Page is updated regularly, giving fans a reason to come back and tell their friends about you.
You can learn more here: http://www.facebook.com/advertising/?pages

A Facebook Group is intended for a gathering place on Facebook for special interest groups. Again it’s very easy to set up a group. You can learn more here: http://www.facebook.com/grouphome.php#/help/?topic=groups

Now of course you can use a Group for a business or Page for a special interest group – but some facilities are built on the intended purposes. The Fan Pages are visible to anyone, you have a wider selection of applications with Pages and you can place ads with the Pages.

You need to have an individual account on Facebook to start a Page or Group. That’s where some problems come in because once you are the owner of a Group or Page it can be difficult to leave. According to Facebook a creator cannot leave a Group, although according to some discussion http://www.facebook.com/topic.php?uid=10381469571&topic=9632 there may be loopholes. The same discussion seems to indicate that it is also difficult to leave a Page. So to be safe, it might make sense to create a individual account separate from your personal account to create a Page or Group – unless you’re sure you’re involved for life.

One quick note from last week’s post on Magic Jack – Garrick in Minneapolis sent me a link to a fun related article:
http://siliconangle.com/blog/2010/01/06/exclusive-magicjack-to-announce-worlds-lowest-priced-femtocell/