Why are the aerials placed on top of high buildings or towers?

Aerials are placed on top of high buildings or towers to achieve a broader coverage area for transmitting and receiving signals, such as radio, television, or telecommunications. The elevated position helps minimize obstacles like buildings and terrain that can interfere with signal propagation. Additionally, height increases the range of the signal, allowing it to reach more users effectively. This positioning is crucial for maintaining clear communication and broadcasting over large distances.