This message says that the plugin you are installing requires that your version of Moodle be at least , that is released on 2020-11-09 or November 9, 2020.
Be sure to choose the version of the plugin that is the right version for your Moodle. You will find the Moodle version in Site admin > Notifications at the bottom of the page, where there are two parts: a release number such as 3.10.0 and a "build" number which is in that date format such as 2020110900.
Every plugin in the plugins database
will have a tab called Versions, which lists the various versions and release dates available for that plugin. Plugin version numbering is not always the same as the Moodle version numbering, so be sure to check which version or versions of Moodle the plugin is intended to be used in.