# Mastering popup, popunder and clickunder formats for effective traffic campaigns Popups, popunders, and clickunders are three common ad formats used by marketers to capture user attention and drive targeted traffic. Each of them works differently, but all three can be effective when integrated into a well-structured campaign. Understanding how they operate helps advertisers choose the right format for specific goals, whether they focus on visibility, conversions, or gentle engagement. Popunder ads open in a separate browser window behind the main tab, allowing users to first interact with the page they intended to visit. This reduces irritation while still keeping promotional content visible later. In contrast, popups appear instantly on top of the content and are much harder to ignore - [popup vs popunder](https://pmaffiliates.com/blog/en/news/promoting-affiliate-marketing-gambling-offers-via-popunder-clickunder-traffic/) is often a question of user experience vs. direct impact. Clickunders function similarly to popunders but activate only when a user clicks an element on the site, giving them a more controlled and predictable trigger. In practice, popunders and clickunders are widely used for performance-driven campaigns because they generate steady engagement without disrupting the browsing flow. Popups, while more intrusive, can deliver strong results when used sparingly for offers, sign-ups, or time-sensitive promotions. To get the most out of these formats, advertisers test triggering logic, creatives, and placement frequency to match user intent and platform guidelines. When applied strategically, each format - popup, popunder, or clickunder - can significantly strengthen visibility and improve campaign ROI across a range of verticals, including highly competitive niches.