The `target="_blank"` attribute is a standard HTML way to specify that a link should open in a new window or tab. The underscore prefix indicates that it is a reserved keyword in the context of link targets, which can also include `_self`, `_parent`, and `_top`. Users have mentioned interesting notions regarding the evolution of link targets, such as conceptual ideas for mobile and desktop link transfers. Additionally, there's a recognition of the historical context, including the browser wars of the 90s, where certain standards and practices emerged.