Media follows every step and multiple stories to provide the public with continuous updates. It has transformed and evolved to an effective communicating mode through radio television internet access it conveys a sense of unity and 80 to 90% of the people browse news for an average of 24 hours a week. It is recognised as a powerful source as it helps in shaping the things happening around the world and ourselves. Social media has an important role to play in every aspect like business, education and all other important information not only as an entertainment tool. Nowadays, some companies utilise social media platforms to advertise their products and sell them online. Educators use social media to communicate some useful stuff related to their subject and share their opinion. It also has a dark side to be discussed like the spread of misinformation. Even before the authorised announcement of Covid19, the use of mask and hand sanitizers was at a hike due to the panic caused by social media regarding the outbreak. A cross sectional survey was conducted to assess the knowledge of the public on social media on the pandemic COVID 19. The sample size chosen for the study was hundred people from the Chennai district. A questionnaire consisting of 15 questions were circulated through online and the data collected were statically analysed using SPSS software. Chi square test was used to analyse the significant difference between the gender and responses on knowledge and awareness based questions.It is clear that the majority of the population are aware about the role of social media during covid-19 and also the spread of misinformation through the same media platform. From the results obtained it can be concluded that the population involved in this study is aware about the role of social media during covid-19.