Rare earth elements (REEs) are a group of 17 chemical elements in the periodic table, including scandium, yttrium, and the 15 lanthanides. These elements have unique properties that make them essential components in various high-tech products and technologies, such as electronics, renewable energy systems, and defense applications. Research in the area of rare earth elements focuses on understanding their geochemical behavior, extraction methods, recycling techniques, environmental impacts, and their role in sustainable development. Due to their critical importance and limited global supply, researchers are also exploring new sources of rare earth elements, such as deep-sea mining, urban mining, and exploring alternative materials that can replace or reduce the reliance on REEs. Overall, research in the area of rare earth elements is essential for ensuring a stable and sustainable supply of these critical elements for the future.