Most people believe that our schools and colleges are failing to teach kids and youngsters in the 21st century skills they will need in order to succeed in the future (Rachna Rathore 2009). Even as the price of technology continues to drop, computers keep getting faster, and nearly all teens are exploring online social networking, schools have not only fallen behind other countries, but administrators have fallen behind of their own students.  Communication technology, particularly real-time and collaborative online communities, represents an enormous draw for teens. Doctors no longer use 19th century practices on their patients; likewise educators have a duty to incorporate modern technology into the classroom. The power to harness multimedia, Blogs, Forums, Chat Rooms and other Web 2.0 technology, safely, for educational pursuits, is now in your hands (Starkman, Neal 2007). The aim of the study is to find out the level of “PG STUDENTS PERCEPTIONS OF THE PEDAGOGICAL BENEFITS OF WEB 2.0 APPLICATIONS’’. The investigator used a survey method for doing this research. The investigator used the self prepared questionnaire for collecting the data. The investigator has been collected 240 samples in Thoothukudi District, Tamilnadu using random sampling technique. The investigator has been used percentage analysis, t-test and chi-square test for analyzing the data. The findings of the study were most of the PG students did not familiar with the web 2.0 tools and have a positive perception towards the pedagogical benefits of web 2.0 applications. There is no significant difference in the mean scores of perceptions towards pedagogical benefits of web 2.0 applications among the postgraduate students with respect to their Gender, course of study and locality of the institution.