During this 'Ring of Fire' eclipse, the Moon as it will be too far from Earth to completely shadow the Sun, will create a radiant outline of sunlight around its dark centre that outline is called as the 'Ring of Fire' solar eclipse
When the Moon passes between the Earth and the Sun attempting to obscure the Sun, it is at a distance where it fails to completely cover the Sun exhibiting a glowing ring of sunlight around the dark centre of the Sun