topr8 - 6:51 pm on Mar 21, 2012 (gmt 0)

from what i understand - if people LIKE your business, then if you make a post it goes onto their newsfeed ... which is ideal if your business is very focused, such as a tv show, pop star niche brand and so on, as your post goes to the people who are going to be interested.

however if you are vast like amazon then most customers are disinterested in a large part of their inventory and universal messages may not appeal... however by sharing something the user then posts this to their wall and effectively shares it with their friends - who are possibly likely to also be interested in the item.

basically LIKES are like building a mailing list.