BT Group is a British telecommunications company that provides a wide range of services, including fixed-line and mobile communications, broadband, and television. Founded in 1846, it has grown to become one of the largest telecom providers in the UK, serving millions of customers. The company operates various brands, including BT, EE, and Plusnet, catering to both residential and business clients. BT Group is also involved in providing network infrastructure and services to other telecom operators, contributing to the overall connectivity in the UK and beyond.