What is the origin of the idiom "skin in the game" and when to use it?

The idiom "skin in the game" is derived from the concept of gambling, where a person who puts their own money on the line is said to have "skin in the game." The phrase is used to describe someone who has a personal interest in the outcome of a situation, and is therefore more likely to be invested in the outcome and to take action to ensure that it is successful.