Altmetrics measure the reach and impact of research beyond the traditional assessment tools of Journal Impact Factor and citation counts. They include other categories of metrics, such as usage (downloads, views), captures (bookmarks, favorites), mentions (blogs, news), and social media (tweets, likes, +1’s). Altmetrics allow for more timely impact measurement than traditional citation counts, and they tell the story of the public impact of research as well as who is interacting with it. Altmetrics can also contribute to the conversation with funders and grant providers showcasing the full picture of the work they fund. This session will describe what altmetrics are, how they are gathered, and how they can be used. It also will include discussion of the future of research assessment.