What is IT Support? IT Support is a service provided by an IT company to keep your computers, internet and programs working smoothly. Providing IT support is essential for larger companies as they may have their own dedicated IT team to deal with issues that arise. Some IT support companies also offer time & materials support. Time & materials support is charged by the time it takes to resolve an issue. However, it is important to know what your company will be charged for a certain type of support.