This document provides an overview of tools that can be used to measure the effectiveness of digital marketing efforts on Google+. It discusses several metrics that are important for understanding engagement on Google+ including circle rank, shares, +1s, impressions, and follower growth. Several specific tools are outlined that can analyze these metrics for a Google+ profile or page, such as All My + Statistics, Simply Measured's Google+ Reports Page, PlusClout, Circle Count, and Recommended Users. These tools provide analytics on key metrics and allow comparison to competitors.