Rajesh Kumar Soni

Laughter is an audible expression or the appearance of happiness, or an inward feeling of joy (laughing on the inside). It may ensue (as a physiological reaction) from jokes, tickling or other stimuli. It is in most cases a very pleasant sensation. Laughter is found among various animals, as well as in humans. Among the human species, it is a part of human behavior regulated by the brain, helping humans clarify their intentions in social interaction and providing an emotional context to conversations. Laughter is used as a signal for being part of a group — it signals acceptance and positive interactions with others. Laughter is sometimes seemingly contagious, and the laughter of one person can itself provoke laughter from others as a positive feedback. This may account in part for the popularity of laugh tracks in situation comedy television shows. Laughter is anatomically caused by the epiglottis constricting the larynx. The study of humor and laughter, and its psychological

Social media are media for social interaction, using highly accessible and scalable publishing techniques. Social media use web-based technologies to transform and broadcast media monologues into social media dialogues. Andreas Kaplan and Michael Haenlein define social media as "a group of Internet-based applications that build on the ideological and technological foundations of Web 2.0, and that allow the creation and exchange of user-generated content." Businesses also refer to social media as user-generated content (UGC) or consumer-generated media (CGM). Social media utilization is believed to be a driving force in defining the current period as the Attention Age. A common thread running through all definitions of social media is a blending of technology and social interaction for the co-creation of value.     Social media can take many different forms, including Internet forums, weblogs, social blogs, microblogging, wikis, podcasts, pictures, video, rating an