Teen use of facebook is declining nowadays.Teens are migrating to Snapchat and Instagram as communication is carried using visual content. Despite waning popularity, Facebook is the king of social media. Facebook is the biggest social network both in the US and in the UK. It has 2 billion monthly users worldwide.Personally,as I am not so much into photos,I use facebook more.One who is more interested in posting and viewing photos,they will prefer instagram more.