Google has removed 164 Android applications from the official Play Store after security researchers caught the apps bombarding users with out-of-context ads last year. Samsung offers a range of smartphones — with the A-series, S-series, Note line, and new foldables. Out-of-context ads, or out-of-app ads, is a relatively new technical term that refers to mobile ads that are shown inside a popup or on the entire screen, separate from the original app.
Link: More than 10mil users installed Android apps that showed out-of-context ads
via http://www.zdnet.com