A Google Analytics plugin for measuring page scrolling
Scroll Depth is a small Google Analytics plugin that lets you measure how far users are scrolling. It monitors the 25%, 50%, 75%, and 100% scroll points, sending a Google Analytics Event for each one. You can also track when specific elements on the page are scrolled into view.
The plugin provides native support for Universal Analytics, Classic Google Analytics, and Google Tag Manager, and can be used with any analytics service that supports events.