Whether modal or not, most overlays appear at the wrong time, interrupt users during critical tasks, use poor language, and contribute to user disorientation.| Nielsen Norman Group
Discover everything about in-app messaging. Learn how in-app messaging works, how to use it properly, and how to create successful in-app messages.| Refiner Blog
On the average Web page, users have time to read at most 28% of the words during an average visit; 20% is more likely.| Nielsen Norman Group