The studies carried out to research the effects of mass communication on societies provide a basisfor communication activities. Those activities generally draw the attention as the activities related tothe need of sovereigns for leading the society. The sovereigns who desire to maintain the new developmentsoccurring in technology under their own domination fields use mass communication moreeffectively as a directing tool.Especially, social media is commonly used as one of the most important mass communication tools ofour age. It is a reality that social media plays an important role in determining the social agenda. It ispossible to see the use of internet on every field from forming a society to political marketing.Social networking sites, especially, Facebook and Twitter appear to be the most active sites of currentnew media. The agenda setting approach developed by McCombs and Shaw is an approach whichreveals that the media is extremely successful in determining what people will think about.In this study which has been carried out, it was aimed to reveal that the Agenda Setting Approachwhich still maintains its importance today and forms the theoretical infrastructure of various studiesis rather effective on setting agenda through Social Media. Literature review method was used in thestudy and the studies in the literature which were executed in the field related to the determination ofagenda by social media were employed.