This document discusses practical applications of altmetrics data. It begins by outlining different altmetrics data providers and how they may provide differing results. It then discusses how to design altmetric solutions by selecting appropriate indicators and approaches based on goals and target audiences. Several examples are given of how altmetrics can be used for monitoring attention to research and evaluating impact through case studies and researcher profiling. Interpreting altmetrics data requires consideration of proxy alignment, changes in data collection, and errors.