Microscopy remains an essential tool in veterinary pathology, offering critical insights into the cellular and subcellular structures of animal tissues. This chapter introduces the foundational principles of microscopy and highlights its importance in veterinary diagnostics, where early and precise identification of diseases is vital. Thus, the chapter provides a comprehensive understanding of how microscopic analysis enhances diagnostic accuracy. Various microscopy methods are discussed, including brightfield, phase-contrast, fluorescence, confocal, and electron microscopy, each with unique applications and advantages in veterinary medicine. Brightfield microscopy is fundamental for routine examinations, while advanced techniques like fluorescence and electron microscopy offer higher resolution and specificity for identifying diseases such as infections and cancer. The chapter also examines how microscopy aids in reproductive studies and veterinary research, contributing to better disease management and treatment outcomes. Additionally, challenges such as sample preparation quality, equipment costs, and the need for specialized training are discussed, alongside the integration of computational tools that enhance diagnostic capabilities. This chapter provides a roadmap for veterinary professionals to navigate the evolving field of microscopy and its expanding role in improving animal healthcare.