The constructed wetland (CW) performance depends on constructed wetland, bed media, and vegetation variations. This study represents a descriptive review of wastewater methods for wetland construction. The wastewater generation includes dairy waste, textile waste, piggery waste, petrochemical waste, tannery waste, etc. This review summarizes constructed wetlands variations, including vegetation, efficiency removal, maintenance, and construction cost. The fundamental definition of CW is that it is an eco-friendly technique to remove the pollutants from the wastewater and is mostly used by petroleum refineries, municipalities, the drainage system of agriculture and so on. Earlier, multiple innovations in the microbiology field eventually correlated with wastewater contaminants removal techniques. This review provides a brief review of the CW key aspects, like the CW types, challenges, opportunities, applications, materials, the recent advances. It also covers the current-technical advancement evaluation report and frames the unsolved CW problems. The terminology on the performance metric demonstrates that the CW community is growing rapidly. This manuscript has also mentioned an outline of the future trends and research proposals.