Questions about determining permissibility: "Is X haram/sinful/forbidden?", "How haram is X?", "Under what conditions is X haram?". (Do not use this tag by itself; add the relevant tags for X.)
Halal and haram are usually used to classify what kinds of things are permissible or forbidden in Islam for example: when it comes to foods you can eat, pork is haram and fish is halal. These words can also be used to classify actions, like to commit zina/sex outside of marriage is haram and to do good and forbid evil is halal.