Reach shows the potential number of people that might have come across news. This is estimated by a daily Reach per post/account, for example. How this is calculated varies on the media type. The following is an explanation of how we establish the Reach for each media type.
Articles: Based on Alexa Reach*. Potential Reach.
Blogs: Based on a combination of Alexa Reach and Twingly's blog rank. Potential Reach.
Twitter: The number of followers a Twitter account has when the tweet was posted. Potential Reach.
Facebook: The number of followers/fans a Facebook page has at the time of the post. Potential Reach.
YouTube: The amount of views for a video. This data is updated up to five days after the video has been fetched. Definite Reach.
Instagram: The amount of people following an account. This data is collected continuously. Potential Reach.
Forum: Based on Alexa Reach, divided by 1000. Alexa Reach displays the number of site visitors, and since a forum has thousands of threads, we divide that number by how many we estimate visit a specific thread. Potential Reach.
*About Alexa Reach
Alexa is one of the most established tools for measuring reach. We do not have the exact formulas used, but it is important to understand that it does not present the definite Reach. Alexa uses different factors to establish the number of visitors on a page. It is not possible to get more exact information than this, since this data is not public.