The subjunctive mood refers to verbs that are used to describe hypothetical or non-real actions, events, or situations. This is in comparison to the indicative mood, which is used to express factual, non-hypothetical information.

We most commonly use the subjunctive mood to express desires or wishes; to express commands, suggestions, requests, or statements of necessity; or to describe hypothetical outcomes that depend on certain conditions.

When I saw the title at the first glance, I thought it was "subjective". But when I changed to the big-mode... ah, it's "subjunctive"