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(https://wordpress.org/plugins/wp-scroll-depth/) is a free plugin that works with Google Analytics to help you see how far down your visitors are scrolling. You also have the option to track events of three different types: Percentage: Percentage events are fired at the 25%, 50%, 75%, and 100% scrolling points. There’s also a Baseline event which fires as soon as the page loads. Pixel Depth: Pixel Depth events record the scroll distance in pixels, rounded down to the nearest 250px increment. While the percentage events provide a relative measure of scroll depth, pixel depth events provide an absolute measure. This can be useful for comparing across devices where the relative percentage heights vary greatly (e.g., desktop vs mobile). Elements: You can also track when specific elements on the page are scrolled into view. On a blog, for example, you could send a Scroll Depth event whenever the user reaches the end of a post. https://youtu.be/SzI9RzvnwZA