In this knowledgebase article, you will learn What Admin Notices Are and how to Disable WordPress Admin Notices.
Admin notices are all these plugin recommendations (to rate, buy premium variants, or simply unuseful notices)
Disable WordPress Admin Notices Via a Plugin
Here we have a recommended list of free plugins to help you hide those annoying notices from your WordPress admin dashboard:
Another free alternative with just a few ratings but it will do the trick as well as the first one.
Remove Admin Via Code
All these admin notices can also be disabled by adding code in your child theme‘s functions.php:
add_action('admin_enqueue_scripts', 'modeltheme_admin_theme_style');
add_action('login_enqueue_scripts', 'modeltheme_admin_theme_style');
function modeltheme_admin_theme_style() {
if (!current_user_can( 'manage_options' )) {
echo '<style>.update-nag, .updated, .error, .is-dismissible { display: none; }</style>';
}
}