Google penalizes intrusive popups on mobile devices that doesn't give mobile users the freedom not to see the popups. "Click popup" is the only trigger type of the popup that is an exception to this new guideline set by Google. You can visit this page to find out more information about this guideline: 

To avoid any negative influence on your SEO rank while using a popup, you need to do the following:

A. Check "Hide on mobile devices" from popup publishing wizard to disable the display of the popup on mobile devices (recommended)
B. Or use click popup as your trigger type

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