To enable or disable this mode, you can use the room configuration form. If you want to enable it for all your chatrooms at once, you can use the button bellow.
By enabling this option, the moderation bot will automatically delete messages containing more than X special characters. Special characters are those that don't fit into one of these categories: letters, numbers, punctuation symbols, currency symbols, emojis.
By enabling this options, the moderation bot will automatically moderate duplicate messages. That means if a user send the same message twice within X seconds, the second message will be deleted.