[Publish] What does "Potential" mean?

This article relates to the Posts Report under Analytics.

One of the metrics you'll see for tweets is "Potential". This is the sum of your followers plus the followers of any Twitter accounts who retweeted your tweet. For example, if you have 100 followers on Twitter, your potential reach when you share a tweet, would be 100. If someone then retweeted your tweet and they have 150 followers, your potential reach becomes 250.