FILL A SLOT definition and meaning

Add a slot to a component's HTML file so a parent component can pass markup into the component A component can have zero or more slots

a narrow, elongated depression, groove, notch, slit, or aperture, especially a narrow opening for receiving or admitting something, as a coin or a letter

alpha slot 777 Instructs slot services to render the slot enableServices Enables all GPT services that have been defined for ad slots on the page

area slot 789 The slot global attribute assigns a slot in a shadow DOM shadow tree to an element: An element with a slot attribute is assigned to the slot