This chapter provides a foundational introduction to self-healing materials, exploring their definition, significance, and evolution in material science. It begins with a historical perspective, outlining key developments that have led to the current understanding of self-healing materials. The chapter emphasizes the increasing importance of these materials in addressing global challenges such as sustainability, environmental degradation, and the need for long-lasting, efficient technologies. By investigating their potential to extend the lifespan of products and reduce waste, self-healing materials are presented as a critical solution for future industries. The chapter also discusses the intersection of physics and chemistry in enabling self-repair mechanisms, positioning these materials as vital for next-generation innovations across sectors like construction, energy storage, and biomedical devices.