Well-being or welfare is what is ultimately good for a person, including everything considered valuable for them. It is a measure of how well a person's life is going for them, both in a positive and a negative sense.[1] In its positive sense, well-being is sometimes contrasted with ill-being as its opposite.[2] The term "subjective well-being" denotes how people experience and evaluate their lives, usually measured in relation to self-reported well-being obtained through questionnaires.[3][4][5]