Peer review, or refereeing, is the process by which a journal article manuscript undergoes critical evaluation from 2-3 other experts (working in the same field as the original researcher) before the journal editor makes a decision on whether to publish that article.
You can find out more about peer review from the links below.
All journals were not created equal. There are a number of statistical tools that are available to give an indication of the relative quality of a journal title. When using these tools, please ensure you are comparing journal titles within a particular subject area only, and that you are aware of the limitations of such tools. More information on journal measures and tools, including h-index, eigenfactor, journal citation reports and more, can be found in the Measuring Research Output LibGuide.