This document discusses various metrics for measuring the impact and productivity of researchers and publications, including the impact factor, h-index, altmetrics, and ORCID IDs. The impact factor is a journal metric based on the average number of citations of articles published in the last few years. The h-index measures both the productivity and citation impact of a researcher or scholar. Altmetrics provide alternative metrics of impact through social media mentions and publications. ORCID IDs assign unique identifiers to individual researchers.