The transition to online education prompted by the COVID-19 pandemic had a negative impact on educational institutions globally, especially in developing countries. The absence of formal online learning management systems (LMS) in many of these institutions presented significant challenges. In response, many educators and higher educational institutions turned in to social media platforms and other digital tools to continue providing education and support the learning process. The present study attempts to understand social media behaviour of new entrants to the faculty of Dental Sciences of University of Peradeniya, more specifically for fulfilling their information need related to academic programs during the CORONA outbreak. The study was carried out at the Faculty of Dental Sciences during the library orientation program for new entrants. Although 117 undergraduates registered with the dental library for the academic year 2022/2023, only 112 students participated in the survey. An online questionnaire made with Google Forms was administered among the research sample.According to key findings, WhatsApp, Facebook, and Research Gate were the most popular social media platforms used by Dental Science new entrants for the purpose of academic information during the COVID-19 pandemic. More specifically, 65% of them had been used these online platforms as a tool of searching scientific and academic information related to their academic programs. There were some positive impacts of using social media for academic purposes. One significant benefit was that social media helped them to maintain better relationships with their peers during the CORONA pandemic, facilitating peer support and collaboration etc. However, the students have perceived some negative impacts of social media as well i.e. students found social media to be quite time-consuming. Despite the potential of educational benefits of social media, the study indicated a gap in awareness and utilization of them for academic purposes. A significant proportion of students, about 35%, were not aware of the educational potential of social media. The majority of respondents appeared to prioritize using social media for entertainment rather than accessing educational content or utilizing academic features available on these platforms. On top of these findings, it can be recommended that educational institutions and policymakers in Sri Lanka consider strategies to harness the educational potential of social media for undergraduates. By raising awareness and encouraging the use of social media for academic purposes, they could enhance the learning experience and make better use of digital tools to support education in the context of ongoing and future disruptions.