What does buffing a unit entail?

Buffing a unit typically refers to enhancing its capabilities to improve its performance in battle. In the context of the options presented, granting a unit a +1 Might marker is a specific form of buffing that directly increases its offensive strength. This enhancement allows the unit to deal more damage, making it more effective in combat situations.

In many games, buffs can take various forms, such as increasing attack power, health, or defensive capabilities. The +1 Might marker specifically is an example of a straightforward way to amplify a unit’s potency, focusing on its offensive abilities.

Other options reflect different actions that could affect a unit but are not prime examples of buffing in the traditional sense. Giving a unit an additional turn generally relates to action mechanics rather than a permanent enhancement of a single unit's capabilities. Increasing its health permanently is more about improving survivability rather than directly enhancing offensive stats. Granting a defensive shield relates to providing temporary protection but does not enhance the unit’s inherent attributes like attack power or overall performance in a direct manner. Thus, the +1 Might marker is the clearest illustration of a buff, emphasizing a direct improvement in how a unit can contribute to battle outcomes.