The concept serves to moderate the power of one branch of government by requiring the concurrence of another branch for selected actions. The expression is frequently used in weak executive systems where the head of state has little practical power, and in practice the important part of the passage of a law is in its adoption by the legislature.
BE IT ENACTED by the Queen's most Excellent Majesty, by and with the advice and consent of the Lords Spiritual and Temporal, and Commons, in this present Parliament assembled, and by the authority of the same, as follows:
This enacting formula emphasizes that, although legally the bill is being enacted by the Queen of the United Kingdom (specifically, by the Queen-in-Parliament), it is not through her initiative but through that of Parliament that legislation is created.
In the United States, "advice and consent" is a power of the United States Senate to be consulted on and approve treaties signed and appointments made by the President of the United States to public positions, including Cabinet secretaries, federal judges, United States Attorneys, and ambassadors. This power is also held by several state Senates, which are consulted on and approve various appointments made by the state's chief executive, such as some statewide officials, state departmental heads in the Governor's cabinet, and state judges (in some states).