Human connections are at the core of society, influencing the way people think, behave, and interact. Social networks, both physical and digital, shape individual experiences and collective structures, determining everything from personal relationships to global movements. Understanding the science behind these connections provides insight into why people form relationships, how they maintain them, and the effects these relationships have on their lives.

The study of social networks is grounded in sociology, psychology, and network science. It examines how individuals are linked to one another through different types of relationships, ranging from close family bonds to distant acquaintances. Each person exists within a web of connections that influences their opportunities, behaviors, and even emotions. These networks function based on two primary types of ties: strong ties and weak ties. Strong ties refer to close relationships, such as family and close friends, that provide emotional support and trust. Weak ties, on the other hand, consist of acquaintances and distant connections that play a crucial role in spreading new ideas, job opportunities, and information.

One of the key concepts in the science of human connections is social capital, which refers to the value embedded in relationships. Social capital can provide tangible benefits, such as career advancement, and intangible advantages, such as emotional well-being and a sense of belonging.