Long Click determines search success because it is when a user stays on the page for a long time without going back to the search results for another source of information or to modify their keywords. Achieving a long click means that you have satisfied the user query with sufficient and relevant information that they are looking for.
Google’s devaluation of intrusive pop-ups and other invasive interstitials to heighten mobile user experience has affected the overall use of the traditional pop-up. SEO experts have constantly questioned if they should still use the pop-feature or not. At any rate, advertising through pop-ups really do work.