This document discusses various metrics for measuring the impact and reach of scholarly research, including journal-level metrics, article-level metrics, author-level metrics, and alternative metrics. It describes citation indexes like Web of Science and Scopus that provide journal-level metrics. It also discusses alternative metrics (altmetrics) that measure online attention through social media, news sites, policy documents and other sources. Finally, it outlines various researcher identification services like ORCID, Researcher ID, Scopus Author Identifier, and Google Scholar profiles that can be used to attribute publications correctly and track citation metrics.