Biochar has emerged as a promising tool for advancing climate-smart agriculture due to its unique physicochemical properties and multifaceted benefits for soil health, crop productivity, and carbon sequestration. Produced through pyrolysis of biomass under limited oxygen conditions, biochar not only enhances soil fertility by improving nutrient retention, water-holding capacity, and microbial activity but also serves as a stable carbon sink, mitigating greenhouse gas emissions. Its application contributes to sustainable land management by reducing the dependency on chemical fertilizers, improving soil structure, and enhancing resilience to climate variability. Furthermore, biochar aids in the remediation of polluted soils by immobilizing heavy metals and organic pollutants. This chapter explores the production methods, characteristics, and agronomic benefits of biochar, with a focus on its role in climate-smart agriculture. Case studies and recent research findings are reviewed to illustrate its practical applications and limitations, emphasizing the need for region-specific strategies and policy frameworks to promote large-scale adoption.