The executive branch is one of three branches of government in a federal system, and it refers to the part of the government that is responsible for carrying out and implementing laws. In other words, this branch is headed by the President or Prime Minister, who has the power to enforce the policies and decisions made by the legislative body (Congress/Parliament). The executive branch also includes various departments and agencies that help to manage different aspects of government operations such as foreign policy, defense, education, transportation, etc. In summary, this branch is responsible for managing the day-to-day activities of the country or state, while the legislative body makes laws and the judicial branch interprets them.