A literature review is a summary or report of the scholarship written in a specific topic. The review should describe, summarize, and evaluate what was previously written by the top scholars in the field. This is the basis upon which you will develop your own ideas.
There are numerous excellent websites that can help you develop your literature review by providing you with resources (links, citations, etc.). The following two websites are your best bets.
Oxford Bibliographies online
History Compass is technically a journal, but all of the articles are written in the form of literature reviews. Specialists analyze the issues involved in a particular question and discuss individual books, journal articles, and other scholarship that are essential for research in that area. Browse or search the journal website for overviews related to your research topic. The bibliographies accompanying articles in History Compass will lead you to relevant sources for further reading. Other Compass titles, like Religion Compass and Literature Compass, may have useful articles as well.