Impactly employs the "Subjective Wellbeing Valuation" method, where the effects of social interventions are quantified in WELLBYs (Well-being Adjusted Life Years). One WELLBY represents a one-point change in life satisfaction for one person over one year. This approach allows us to correlate the impact of various factors, such as reduced anxiety and stress, or enhanced self-esteem, to the individual's overall life satisfaction.