To extend the coverage of a wireless network, a repeater can simply regenerate the signal. The repeater does not need to be physically connected via cables to any part of the network. A wireless repeater can be a good solution when expanding the range of an existing access point. This solution does not add more access points and corresponding cables, so it can be our choice.
A repeater provides connectivity to remote areas. When a router does not cover the entire range that wireless users need to connect to, a repeater can be placed between the covered and uncovered areas to provide connectivity across the entire space.