Below are links about information literacy from The Association of College and Research Libraries (ACRL).
As defined by the American Library Association, information literacy involves the ability to "recognize when information is needed and [...] to locate, evaluate, and use effectively the needed information." (ALA Presidential Committee on Information Literacy - Final Report).
This concise definition, while helpful, cannot fully address the complexity of information literacy. For a more comprehensive explanation please see the Association of College & Research Libraries (ACRL) Information Literacy Compentency Standards for Higher Education.