This document discusses the altmetrics movement, tools, and implications. It defines altmetrics as new metrics based on social media that supplement traditional metrics like citations. It outlines tools like ImpactStory, Altmetric.com, and PlumX that track metrics from news, blogs, tweets and other sources for both traditional research outputs and new outputs like datasets and blog posts. However, issues with altmetrics include a lack of standards and questions around whether they truly reflect impact or just popularity. Researchers are advised to understand what metrics match their research products and use contextualization to explain the value of altmetrics.