A pop-up is a type of online advertisement that appears in a separate window or tab when a user visits a website. Pop-ups can be used to display promotions, offers, or other information, but can also be seen as intrusive or annoying by users. In recent years, many web browsers have added pop-up blockers to prevent unwanted pop-ups from appearing. Website owners can use pop-ups strategically to promote specific content or offers, but should be careful to avoid using them excessively or in a way that interferes with the user experience.
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