Perhaps start here: https://www.nngroup.com/articles/overuse-of-overlays/ https://www.nngroup.com/articles/overuse-of-overlays/ Then ux.stackexchange.com will

Perhaps start here: https://www.nngroup.com/articles/overuse-of-overlays/ https://www.nngroup.com/articles/overuse-of-overlays/ Then ux.stackexchange.com will undoubtedly have some useful pointers as well.... Although some tailored google searches will also help. Back in my UX-only days, I used NN Group a lot in supplementing my own A/B testing - it was a bittersweet relationship, as they provide a suite of analytics-based trackers on many of the websites I visit.