Session replay (in the context of document analytics) captures a visitor's interaction with a shared document as a structured timeline: when they arrived, which pages they viewed in what order, how long they spent on each page, where they scrolled, and when they re-visited.
Unlike web-style session replay tools (FullStory, Hotjar) that record raw browser events, document session replay is structured around the document — making it lightweight, privacy-respecting (no keystroke or form-field capture), and useful for sales follow-ups.