Google Scholar is a freely-accessible Web search engine that indexes the complete text of scholarly literature across an array of publishing configures and regulations. Released in beta in November 2004, the Google Scholar index includes most peer-reviewed online journals of the world's biggest systematic publishers. It is also related to the subscription-based tools.Google Scholar however claims to cover more websites, journal sources and languages Its advertising slogan — "Stand on the shoulders of giants" — is a nod to the scholars who have contributed to their fields over the centuries, providing the foundation for new intellectual achievements.

Google Scholar provides a easy way to mostly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. Google Scholar helps you identify the most relevant research across the world of scholarly research.