If a site isn’t working in Edge because a sign-in window or payment form never appears, a built-in pop-up blocker is usually the reason. Most issues are solved by allowing pop-ups for that specific site, checking your extensions, or clearing a conflicting setting. Pop-up ads or pop-ups are forms of online advertising on the World Wide Web. A pop-up is a graphical user interface (GUI) display area, usually a small window, that suddenly appears ( pops up ) in the foreground of the visual interface. There are many different types of pop-ups, including advertisements, notices, offers, or alerts that can appear at various times on any web page. Some can be helpful, such as when a bank website displays your monthly statement in a pop-up window. By default, Google Chrome blocks pop-ups from automatically showing up on your screen. When a pop-up is blocked, the address bar will be marked Pop-up blocked Learn how to block or allow pop-ups in Chrome, Edge, Firefox, and Safari with clear steps and safe site exceptions. pop-up noun [C] (COMPUTER) (also pop-up menu) a list of choices that is shown on a computer screen when the user requests it: Adblock Plus, the most popular ad blocker on Firefox, Chrome, Safari, Android and iOS. Block pop-ups and annoying ads on websites like Facebook and YouTube.