Judicial activ is simply the judicial rulings in which a ruling overlooks legal precedents or past constitutional interpretations in favor of supporting a particular political view and such ruling are being based on personal opinion, rather than on existing law.
This word was first used by Arthur Schlesinger, Jr. in 1947; While, Judicial restraint helps judges to limit the exercise of their own power where these judges who practice judicial restraint hand down rulings that strictly adhere to the original intent of the Constitution.