Web applications became a part of trendy society. The library profession is additionally not untouched by web applications. The current study has investigated the knowledge, attitudes, and practices of user services on web 2.0 applications among library professionals of Haryana state. A descriptive survey methodology was designed to conduct this study. Whereas, a sample size of one hundred library professionals was chosen for this study. A well-structured questionnaire was utilized by the researcher to gather the primary data for the presented analysis. Out of one hundred library professionals, solely ninety-six professionals have come to the stuffed questionnaire for the analysis of the data. A simple percentage count chart methodology has been accustomed to analyzing primary data. The current study shows that library professionals are extremely attentive to web 2.0 applications like Facebook, YouTube, Twitter, LinkedIn, Blogs, Gmail, Google Drive, and Wikis, and most of the library professionals accustomed to web 2.0 applications for providing library rules, instruction, e-resources sharing, library notice and announcement. Supported the findings, the conclusion was created.

Keywords: Web 2.0, Library Professionals, Web Applications, User Services, Social Networking