Flex clips are used to attach your TV, Satellite, Internet, CCTV or anything really that fits in it to a wall, floor, ceiling, anything that you can screw it to.
They are made to perfectly clamp on to a RG6 or RG59 coaxial cable.
The clips most often are to keep the coaxial TV cable positioned against a wall so that it is out of the way and not tripped on or making your room look messy.