Some databases provide shortcuts to find review articles. Look for options such as "Publication type" or "Article type" to limit your search results to review articles.
Review articles do exactly what their name suggests: they review the literature published on a particular topic. Review articles do not present original research results.
Instead, review articles:
Review articles can provide a starting point for researching a topic. The reference lists will contain citations for the research articles discussed – a good way of locating other literature that may be relevant to your topic. Be aware that a review article reflects the views of its authors - you should still look at the articles discussed and draw your own conclusions.