Definition
An exit popup is an overlay that appears when a visitor signals an intent to leave the page — moving the cursor toward the browser's tab bar or address bar on desktop, or triggering the back gesture on mobile. At that moment the popup makes one last offer designed to recover the visitor: a reminder of the welcome bonus, a simplified one-field form, a discount, or a different framing of the same offer.
The logic is that a visitor about to leave has nothing to lose, so a well-targeted final prompt converts a measurable slice of otherwise-lost traffic.
Exit popups typically add a few percentage points to landing-page and prelander conversion. That uplift is real and, because the traffic is already paid for, it drops almost entirely to margin.
But the mechanic has costs: it degrades user experience, it can violate ad-network or platform policies if it is aggressive or hard to dismiss, and overuse trains returning users to expect and ignore it.
In context
Effectiveness depends on three things: relevance, timing and frequency capping. The offer in the popup must be genuinely more compelling than the page the user was leaving — a bigger bonus, a shorter path, an answer to the objection that made them hesitate — not just the same call to action in a box.
The trigger must fire on real exit intent, not on every small cursor movement, or it annoys engaged users. And a frequency cap must stop returning users from being hit on every visit, which erodes both trust and effectiveness.
In iGaming, exit popups most often surface the welcome bonus with clearer terms, or a two-tap registration path that removes fields. In regulated markets the popup content is subject to the same advertising rules as the main page — accurate bonus wording, age and responsible-gambling notices where required — and an exit popup that misrepresents the offer to claw back a click is both a conversion risk and a compliance risk.
Buyers A/B test the popup offer, copy and trigger sensitivity the same way they test the primary CTA.
Worked example
A casino registration page has a 12% conversion rate. Adding an exit popup that restates the welcome bonus with plain terms and a two-field form recovers 4% of the visitors who had started to leave, lifting overall conversion to roughly 15.5%.
A frequency cap ensures a user sees the popup at most once every seven days.
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