This [https://unicode-table.com/en/002E/ dot] character is used as a list marker. It is a [https://unicode-table.com/en/25CF/ black circle] of medium size in the middle of the row. By default, it is displayed by browsers instead of the [https://unicode-table.com/en/html-entities/ HTML] tag <li>. Another name - bullet. You can type ALT+0405 on the keyboard.