LGA 1155 is a type of CPU socket used by Intel for its second and third generation of processors, known as Sandy Bridge and Ivy Bridge. This socket features a grid of pins that connect the processor to the motherboard, allowing for communication between the two components. Introduced in 2011, LGA 1155 supports various chipsets, enabling features like DDR3 memory and PCI Express connectivity. It is designed for desktop computers and has been widely used in consumer and business systems, providing a balance of performance and efficiency for everyday computing tasks.