From eMarketer on The Advertising Opportunity in Facebook Places [excerpt]: Facebook’s value as a business comes from all the bits of information it gleans about its users from their daily activities. Every single action people take—whether it’s writing a status update, posting a photo, commenting on a friend’s post, liking a marketer’s message or playing a game—becomes an object in Facebook’s database. Location is a type of data that is very compelling because it provides additional context for the actions people take on Facebook…If ads can be pushed to people in the moment they are engaged with something, rather than waiting until they take action and start a search, the ads become very very powerful. Location will give Facebook a new way to target and sell advertising… By offering ways for marketers to target Facebook users not only on the online service but also when they are on the go and using Facebook on their mobile phones, it opens up all-new avenues for interaction.