Start conservatively and treat the timings as a test, rather than a universal setting. If your Sales Pop version exposes these controls, try a 10–15 second delay before the first notification, a 30–60 second gap, a display duration around 4–6 seconds, and a low per-session cap. These are suggested starting points, not claimed app defaults.
Use genuine activity only, keep personal details minimized, and avoid wording that invents purchases or scarcity. On mobile, position the notification so it cannot cover Add to cart, navigation, consent controls or chat. Consider excluding high-intent steps if the app supports page exclusions.
Change one setting at a time. Compare add-to-cart rate, completed orders, dismissals and mobile usability with a baseline; popup clicks alone do not show that the feature helped. With little traffic, collect enough observations before drawing a conclusion.
Which timing and frequency controls are available in your current dashboard? A screenshot with customer details hidden would help tailor the setup.