Clickstream

A clickstream is the ordered record of every page a visitor loaded, every link they clicked, and every other tracked interaction, each stamped with the time it happened. It is the raw material behind web and product analytics: a single pageview is one entry in a much longer trail that, read in sequence, shows how a visitor actually moved through a site.

Clickstream data is typically collected as a stream of individual events following an event data model, then reconstructed into ordered paths per visitor, often grouped into visits through sessionization. This differs from aggregate metrics like total pageviews or bounce rate, which summarize behavior across many visitors; clickstream data preserves the sequence for one visitor at a time, which is what makes path and flow analysis possible.

Clickstream data matters because sequence carries information aggregates discard — whether visitors reach checkout before or after viewing a return policy page, for instance, changes what a team should fix. The main pitfalls are volume, since a busy site generates enormous row counts that strain storage and query cost, and gaps from ad blockers, bot traffic, or failed page loads, which can silently distort the user journey analytics built on top of it.