The document discusses how social networks have expanded and become more complex, with people now able to interact within and across networks through online platforms. It notes that businesses and entrepreneurs can learn lessons from this change, as personal networks were previously more segregated and relied solely on face-to-face interactions, which led to high attrition rates. The presentation provides a case study on how the matrimonial industry has been impacted and gives examples of how social networks now grow organically across different parts of people's lives from school to work.