PLEASE SUBSCRIBE OUR YOUTUBE CHANNEL OPENKNOWLEDGE or see URL https://youtu.be/nPLnJqLEknY Research Indices are the indicators of the credibility and recognition of a researcher, a journal, an article and/or and institute. These include Impact Factor, immediacy Index, h-index etc. Researchers and students must know about these indices for better recognition in the academia and research. In the first part of the series we are discussing Impact Factor as a vital research Index. Impact factor (IF) is the most Important basis of selection of journal by the researchers and readers. Its a a measure of the reputation of a journal. IF is a measure of the frequency with which the "average article" in a journal has been cited in a particular year. The OER shall cover how (IF is calculated), Who (provides the IF), on which factors IF depends upon, The importance of IF in academic recognition and knowing the IF of journal. Also SUBSCRIBE OUR YOUTUBE CHANNEL OPENKNOWLEDGE or see https://youtu.be/nPLnJqLEknY