The use of high-energy biomass for water purification poses a threat to a healthier and more sustainable environment. Constructed wetlands (CWs) have gained global acceptance as an eco-friendly approach due to their reduced energy requirements, cost-effectiveness, and mitigation of environmental impacts. CW represents an eco-friendly method for eliminating contaminants from polluted water and has been employed in the treatment of urban sewage, wastewater from oil refineries, agricultural runoff, etc. Efforts have been made to forecast forthcoming progress in the realm of CW and help these advancements by outlining pivotal unresolved issues in CW. Protocols are established for the burgeoning CW sector through the uniformization of essential design elements. This chapter encompasses the examination of the contemporary cutting-edge CW methods and furnishes explanations and terminology for performance measurement nomenclature, aiming to harmonize the rapidly expanding CW. It acknowledges that the present circumstances and perception of CWs necessitate critical reevaluation of their operational aspects. Specifically, it recognizes the need for more rigorous regulations and efficient enforcement of CW ecological evaluation guidelines in village and suburban communities. It also provides an up-to-date overview and critical insights on achieving environmentally friendly CW practices with minimal long-term ecological impacts. A prospect on the budding tendencies in CW technology and future directions for innovative research is explained. Finally, it also outlines the advances in the use of CW technology and highlights the challenges that, if ignored, could undermine the feasibility of this technique and its purported benefits.