Facebook has indexed almost trillions of post put on their site by its members to make it easier for them to find any old post. This seems to be a very positive move of Facebook that it wants to engage its community not to go anywhere and keep up-to-date. Every kind of options are available now, if anyone don’t want to access their previous post then there is also an option for them which is widely accessible. The move puts Facebook into direct competition with Twitter which recently introduced a similar system called Moments.
Although Facebook has a much wider audience then other social websites. So Facebook’s potential reach for its search tools is exponentially larger.”