There is not necessarily a link between the upstream site and this site.
The "Sites Linking In" count shows the number of sites that Alexa found that link to this site.
The table shows the top subdomains for this site ordered by the percentage of visitors that visited the subdomain over a month.
Bounce Rate (%) Percentage of visits to the site that consist of a single pageview.
Search Traffic The percentage of traffic, both free and paid, that come to this site from a search engine over the past 3 months, updated daily.
The change number shows the difference versus the previous 3 month period.
We identify these patterns by looking at the activity of millions of web users throughout the world, and using data normalization to correct for any biases.
The more traffic a site gets, the more data we have to calculate estimated metrics.