The article discusses the importance of advancing clean iron production to achieve a decarbonized steel sector. Iron production plays a significant role in emissions within the steel supply chain, with over 80% of emissions attributed to this stage. To reduce the carbon footprint, transitioning to near-zero emissions ironmaking, particularly through the use of renewably-produced hydrogen, is crucial. There is a global trend towards cleaner iron production, with a focus on high-ambition iron-level emissions thresholds to guide investments and purchasing decisions. Steel purchasers, financers, and policymakers are increasingly interested in supporting near-zero emission iron supply, with initiatives and projects emerging in regions like the Middle East, North Africa, Brazil, and Western Australia. The article stresses the need for a clear definition of clean iron production to streamline financing, procurement, and trade of climate-differentiated steel products. Key use cases for a near-zero iron threshold include facilitating mini-mill product decarbonization, enhancing transition finance through measurement frameworks, and supporting corporate procurement for emissions reduction. Establishing transparent standards for clean iron production is seen as a critical step towards achieving a sustainable and low-carbon steel sector.