According to positive psychologists, an individual’s subjective well-being consists of one’s and

The answer is Overall level of happiness and life satisfaction

Individual's subjective well being refers to the well-being factors that couldn't be measured by other people beside ourself.

This type of well-being usually had very unique standard depending on the type of personality of each person. (for example, someone define happiness as having a lot of money, while others define happiness as having a lots of kids, etc)