This document provides an overview of developing a social business model canvas. It discusses key concepts like customer empathy, lean startup, business model canvas, value proposition design and theory of change that are important for building a social business. Examples of different types of existing social businesses are also provided like Grameen Bank, Grameen Eyecare Hospital, Dialog in the Dark etc. The document then dives into creating a sample business model canvas for a hypothetical social business accelerator called Young Social Business (YSB). It outlines the customer profiles, jobs, pains, gains, value propositions, and other elements to visualize how the YSB business would work.