The Google Analytics Behavior Flow report is a visual representation of the path that users travel from one page to another on your website. It was created in order to help you understand what content is most engaging on your website. You can select different types of content, such as “pages,” “content groupings,” or “events” to see how different types of engagement differ from one another.
The Behavior Flow report is composed of “nodes” (which are points through which traffic flows) that are connected by lines. A node might represent a single page, a collection of pages, an event, or a dimension value (for example, landing page). This is a useful report to complement your other “behavior” reports, such as the “All Pages” and “Page Drilldown” reports.