The importance of studying the Facebook like button with 1.44 billion monthly active user in early 2015 ,facebook is the leading social networking site in most countries worldwide .for younger generations,facebook is not only a tool or an application on the internet but also a ubiquitous level of reality,where the boundaries between online and offline actions are increasingly blurred (wittkover,2014).especially for users of the facebook mobile client,checking status updates and interacting with facebook friend have become part of their daily routine .