Project financing involves a corporate sponsor investing in and owning a single purpose asset through a legally independent entity financed through non-recourse debt. It is used for large infrastructure projects due to risk minimization and raising sufficient funds. Key features include being ring-fenced with high debt-to-equity ratios and no sponsor guarantees. Advantages are reducing sponsor risk and leverage while obtaining better rates, while disadvantages include higher costs and restricted decision making due to extensive contracting. Common project types include roads, airports, bridges, and water supply.