The Jitterater estimates the influence and reach of individual contacts, based on the various elements of their profile, such as Twitter accounts, blogs, websites, etc. The Grade value represents the overall estimate of the individual’s influence, on a scale of 0.0 to 10.0, with 10.0 being the highest level of influence. This Grade value is uniquely calculated for your account based on your overall relationship with the individual, if any, and other data we obtain externally such as the individual’s network size, communications history, number of profiles, and inbound link information. The Reach is an estimate of the individuals’ audience size, by contact identity and in total. For Twitter, this is the number of followers, while for other identities this is estimated based on data points such as number of inbound links, subscribers, and similar data points.