What does the term "Vis Major" or "Act of God" primarily signify in legal contexts?

Vis major is a Latin term that means "superior force" and describes an irresistible natural occurrence that causes damage or disruption and that is neither caused by nor preventable by humans—even when exercising the utmost skill, care, diligence, or prudence. The gist of Vis Major or an Act of God it is just not the positive intervention of superior forces that absolves one of liability but more importantly that it is an inevitable, unpredictable and unforeseeable actions of superior forces that occur without human intervention.