Yes. VWO Surveys allows a user to trigger a survey if a visitor scrolls a certain amount on a page. A user can define the number of pixels or percentage of page height a visitor needs to scroll either from the top or bottom of the page to trigger a survey. Percentage of page height is useful for webpages with fixed height. For infinitely scrolling pages such as search results on an e-commerce webpage, actual pixels scrolled is a more reliable way.
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