While googling "Sentiment analysis metrics" I came a cross an instructive and useful video series on YouTube called "1 metric, 1 minute" where Dr. Kaye Sweetser from University of Georgia explains diverse social media metrics around 1 minute. Here is the information on her YouTube channel. You find the link below.
Source: http://youtu.be/9wL10eJLS8M
Dr. Kaye Sweetser from UGA quickly discusses what to count when it comes to social media. She said raw counts of number of followers is not meaningful and suggests counting engagements instead. This is a part of a social media measurement series for her students called "1 Metric, 1 Minute."
Source: http://youtu.be/9wL10eJLS8M
