Back in 2010-2012, the web was built on Flash. Websites, games, video players, and banner ads all ran on Adobe Flash Player. Steve Jobs famously banned it from the iPhone, calling it a battery-draining security nightmare.
Installing an outdated Flash plugin exposes your Android device to several risks: plugin flash android
Most websites have migrated to HTML5, which provides the same interactive experience as Flash but with better security and lower power consumption. If a site still requires Flash, it is often a sign that the platform is no longer being maintained. To help you get the best experience, let me know: Are you trying to play a ? Do you need to access an old work portal ? What model of Android device are you currently using? Back in 2010-2012, the web was built on Flash