At present day in this twenty-first century we are living in virtual world and Library and informational science professional’s need to use social networking sites for academic users. The main purpose of this paper is to examine the effectiveness of using online advertising on the social networking sites Facebook and Twitter in academic libraries and recognize essential trends that subsist. While it is understandably exciting to embrace new technology to reach students and staff members, it is very important to have an understanding of how to utilize the technology to properly connect to library users. Several articles found in library publications are written from a librarian’s perspective, explaining the essence of Facebook and Twitter are describing different ways to promoting library advertising and services.