<p>Soil stabilisation is a widely used geotechnical technique for improving the engineering properties of weak soils to make them suitable for construction and infrastructure development. Natural soils often exhibit inadequate strength, excessive compressibility, and poor durability, which may lead to structural instability and ground deformation. Stabilisation methods are therefore applied to enhance soil performance by modifying its physical and chemical characteristics. This study presents an overview of commonly used soil stabilisation techniques and evaluates their effectiveness in improving geotechnical properties such as shear strength, compaction characteristics, and bearing capacity. Traditional stabilising agents, including cement, lime, and fly ash, are examined along with emerging sustainable materials such as agricultural fibres and industrial byproducts. The mechanisms of stabilisation are discussed in relation to particle bonding, pozzolanic reactions, and reinforcement effects. Results from previous experimental investigations indicate that the addition of stabilising materials can significantly improve soil strength and reduce plasticity. The study highlights the potential of combining conventional stabilisers with environmentally friendly additives to develop cost-effective and sustainable stabilisation solutions for geotechnical engineering applications.</p>