A more thorough explanation:

A joint ballot is a type of voting where legislators from both houses sit together as one body to cast their votes. This is different from a regular ballot where individuals cast their votes separately.

For example, in some states, the joint ballot is used to elect judges or other officials. Legislators from both the House of Representatives and the Senate come together to vote for the candidate they believe is best suited for the position.

Another example is when a joint ballot is used to elect the President of the United States. The Electoral College, made up of electors from each state, casts their votes together in a joint session of Congress.