Content
Behavior
Also called on-site behavior.
Behavior is the report family that explains what people did after arrival: which pages they read, where they clicked and when they left.
How it is measured
Build it from the hits you already collect: pageviews, events, session lengths and exits. Group them into paths, popular pages and engagement summaries. It is a view over data, not a separate metric.
Tarsier covers the basics: pageviews, visit duration from engagement pings, bounce and custom events. Deeper behaviour such as clicks and scroll needs events you add.
Worked example
A pottery school looks at its behavior reports for April. The top page is the class calendar with 4,100 views. People stay 1 minute 50 seconds on average. The pricing page has 900 views and sits at 40 seconds.
The owner joins the two by adding prices to the calendar, and booking events rise by a fifth.
How it differs
Behavior reports describe what happened on the site. Pageview is one input. Event is another. Engagement rate is a summary built from them. It is distinct from acquisition, which describes how people arrived.
Common errors
Reading behaviour reports without knowing the traffic source. Assuming the busiest page is the most valuable. Overlooking device differences. Drawing paths from tiny samples. Treating the report as an explanation.
In practice
Choose one question, such as where do people stop reading the booking page, and use behaviour data to answer it rather than browsing the report.