Facebook was founded in 2004 by Mark Zuckerberg, with some other students of Harvard University. The purpose of Facebook back in those days was a social network that allows members of Harvard University to create social relations through the site. Gradually the website, allow users from other universities and finally it was opened to anyone who was older than 13 years old. However, nowadays Facebook is more than just a social network website that allows people to crate social relations. Facebook now, represent a tool for companies that allows them to create a profile, which can be used to promote its products or its services, or on the other hand it can be used as powerful tool to offer customer service to the customer, in which they can add reviews or comments about the services or products that they just purchased or have the intention to it.
Facebook represents a powerful tool to offer customer service especially for companies who sell services instead of products; this is the case of banks or airlines, among others. Since it is not common that they sell their services through a third party website, which is the case of products, and probably the best example of it is Amazon, where customer can add a review of the products purchased; and on the other hand they do not provide spaces for customer review in their own website either. The reason of this might be that Facebook can reach a larger amount of people than their own website.