The Visitors Flow report is Google Analytics attempt to better show you how people from various dimensions are navigating your site. The report is automatically set to show you movement based on the Country/Territory dimension, however you can change this to something that is probably more meaningful to you such as Source or Medium.
For example, we can change this to Medium to see visitor flow through organic searches. When you right click on organic, you can highlight traffic through this medium to only see these visitors’ behavior, or select “View only this segment” to clear out all other connections.
One place where some people have trouble is that Google categorizes these pages, so for example when I hover over topic, you can see that this behavior encompasses 64 different pages, not just one page.
You can adjust the complexity of this report by raising and lowering the number of Connections in the top or simplify the report by selecting a segment from the top dropdown. The zoom tools on the left allow you to enlarge the chart or move horizontally across.