The judicial branch in a popular system is responsible for administering justice by interpreting the law and applying it to individual cases. It has the power to strike down unconstitutional laws and cover individual rights, similar to free speech, due process, and equal protection under the law. The judicial branch resolves legal controversies between individualities, businesses, and the government, including civil and felonious cases. It interprets the law and applies it to the data of each case, making judges decide what the law means and how it should be applied. However, the bar can declare it invalid, If a law violates the Constitution. The judicial branch plays an essential part in ensuring that the law is applied fairly and impartially to everyone, guarding individual rights, and precluding the government from violating the Constitution. It's also part of the checks and balances system, which allows each branch of government to check the powers of the other branches, precluding any one branch from getting too important. The judicial branch is a pivotal part of the checks and balances system, as it can strike down unconstitutional laws and interpret laws in ways that limit the power of other branches. In substance, the judicial branch is a vital part of a popular system, ensuring fair and unprejudiced operation of the law and guarding individual rights.