This document provides an overview of key Twitter metrics that can be used to analyze a Twitter account's performance. It defines common metrics like engagements, retweets, mentions, favorites, hashtags, potential reach, potential impressions and others. It explains how to calculate engagement and the difference between mentions and replies. The document also outlines basic and advanced ways to analyze metrics to optimize account engagement, measure audiences, campaigns and influence. It provides examples of analysis reports and tools for reporting.