An art critic is a person who specializes in evaluating art. Their written critiques, or reviews, are published in newspapers, magazines, books and on web sites. Art collectors and patrons often utilize the advice of art critics as a way to enhance their appreciation of the art they are viewing. Typically the art critic views art at exhibitions, galleries, museums or artists' studios. Professional art critics are expected to have a keen eye for art and a thorough knowledge of art history. Knowledge, however, provides no guarantee that a critic will know if a work of art, an exhibition, or an artist will stand out in history as "great". The opinions of art critics has the potential to stir debate on art related topics. Due to this the viewpoints of art critics writing for art publications and newspapers adds to public discourse concerning art and culture. Some of today's art critics use art blogs and other online platforms in order to connect with a wider audience and expand debate about art.