"Review articles" are a type of article which provide a survey of knowledge in a particular topic. Some databases make it easy to identify these articles. In Web of Science, once you have your search results displayed, use the "Review" filter on the left to limit to these types of articles. Similarly, in Scopus , look for the "Review" filter on the left, under "Document Type". In INSPEC, search by "Treatment Type" and limit to "General Review". In PubMed, look for the "Review" filter in the upper left once you have your search results displayed.
In certain databases limit your results to peer-reviewed or "scholarly articles." Or look the journal up in Ulrich's International Periodicals Directory. Ulrich's identifies peer-reviewed (refereed) journals with this icon: 
