What to do instead: Allow users to consume the content right away, without interruption. Replace the popup with a thin, easy-to-dismiss banner at the top of the page. This alternative to a popup will let the user self-serve if they want to subscribe to a newsletter, without blocking their main task of absorbing information.
Conde’ Nast Traveller’s website introduced its newsletter in a subtle and nonintrusive dismissible banner underneath the navigation. This design allowed interested users to subscribe to the newsletter, but did not distract those who just wanted to read the site’s content.
Popup Content: Don’t Assume a Modal Overlay Will Deliver the Message
9. Using modal overlays for GDPR and cookie notifications: Users already dismiss modal
