Answer:
Judicial Activism: Judicial activism is the assertion (or, sometimes, the unjustified assertion) of the power of judicial review to set aside government acts. Judicial restraint is the refusal to strike down such acts, leaving the issue to ordinary politics. Through judicial activism, judges can use their own personal feelings to strike down laws that they would feel are unjust. Whether it is an executive order, an immigration issue or a criminal proceeding, judges would have a good vantage point in deciding a certain case's outcome.
Judicial Restraint: Advocates of judicial restraint argue that judges do not have the authority to act as policy makers. Among judicial restraint advocates are Thomas Jefferson, Learned Hand and Hugo Black. Opponents argue that activism is a necessity when the other branches of government do not act to bring about social change.