What is judicial activism and how is this criticism used by members of Congress?

What will be an ideal response?

Judicial activism is the idea that Supreme Court justices are essentially legislating from the bench and overstepping their role as neutral arbiters of the law. The idea is that judges are—but should not be—making decisions on the basis of their personal values or beliefs rather than legal principles. However, members of Congress often use this criticism to attack decisions they do not agree with and are more accepting of similar behavior from justices on their side of issues.