Buzz, a social media metric, is based on:
a. media mentions, influences of bloggers reached, influences of customers reached, and second-degree reach based on social graphs.
b. posts and impressions, by social channel, by stage in the purchase channel, by season, and by time of day.
c. the number of likes, fans, followers, and friends; growth rates; rate of virality or pass along; and change in pass along over time.
d. the number of comments, ratings, social bookmarks, subscriptions, page views, uploads, downloads, embeds, retweets, Facebook posts, pins, and time spent with social media platform.