On January 1, 2021, Adobe Flash Player reached its end of life (EOL). Adobe will no longer release updates to its Flash Player.
“Since Adobe will no longer be supporting Flash Player after December 31, 2020 and Adobe will block Flash content from running in Flash Player beginning January 12, 2021, Adobe strongly recommends all users immediately uninstall Flash Player to help protect their systems.” states the announcement published by Adobe. “Some users may continue to see reminders from Adobe to uninstall Flash Player from their system. See below for more details on how to uninstall Flash Player.”
In July 2017, Apple, Adobe, Facebook, Google, Microsoft, and Mozilla announced the end of the support for the Flash Player by the end of 2020. The software was considered not secure, and was replaced by new software with better performance, such as HTML5.
Read more about it here.