Increased population and growing demand for large-scale agricultural production have resulted in unwanted effects of various pollutants. So, it imparts affecting soil fertility and its health. Its ability to potentially enhance soil quality, sequester carbon, and serve as an active electrode material for supercapacitor applications is gaining attention. While mentioning such types of problems, biochar has developed into an environmentally conscious and sustainable option from historical times to the present era, in increasing fertility, health, and productivity of the soil. The chapter highlights the current studies on production and the use of biochar, through diversification of feedstocks like invasive species, agricultural waste, industrial waste, and production approaches ranging from traditional to contemporary pyrolysis practices. Biochar characterizes as a carbon-rich substance renowned for possessing good assets such as water-holding capacity, enhanced nutrient holding, microbial processes, and general promotion of plant growth. Waste produced from post-harvest and agriculture helps reduce greenhouse gas (GHG) emissions, revitalize soil fertility, and increase water holding capacity—goals that biochar can tackle effectively. Through studies, it has been indicated that biochar strengthens cation exchange capacity (CEC), regulates nitrogen dynamics, and promotes a favourable environment for beneficial microbes, providing soil adaptation and improved crop yields for the long term. Properties like temperature, feedstock, and pyrolysis conditions deliberately distress the pyrogenic carbon properties, internal structure, and nutrient dynamics which are both essential to advance soil vigor and maximize the plant efficacy. Approaches like the hydrothermal carbonization can also be used in modifying such properties, specifically for damp biomass. Biochar is not a new concept; it has been associated with the archaic times of Amazonian Terra preta soils, where the specific enrichment of soils with biochar has demonstrated a prominent role in sustained enhancements of soil fertility and enhanced stability of carbon for centuries. This chapter inspects numerous plants. Sourced feedstocks for biochar manufacture and summaries leading studies on its physiochemical characterization of biochar and its manufacturing rate.