Cast-in-place concrete is a construction method where concrete is poured into molds or forms at the construction site. This technique allows for the creation of complex shapes and structures, as the concrete can be shaped to fit specific designs. Once the concrete sets, it becomes a solid and durable part of the building. This method is commonly used for foundations, walls, and floors. It offers advantages such as flexibility in design and the ability to create large, continuous structures without joints. However, it requires careful planning and execution to ensure proper curing and strength of the concrete.