Impact factor, an index based on the frequency with which a journal's articles are cited in scientific publications, is the most widely used citation metric to evaluate the influence of published research and the prestige of researchers. However, the reliance on impact factor to assess a researcher’s worth has frequently been called into question. This enlightening series covers the buzz around the latest impact factor release, and delves deeper into interesting views such as: Why is it not enough to use the journal impact factor to evaluate research? What makes for good science? Can any other metrics replace impact factor?