When the Shaliach Tzibbur recites the Chazarat HaShatz, the congregation is obligated to listen attentively and respond with "Amen" at the conclusion of each beracha. This communal response is not merely ceremonial; it is an essential part of the tefillah. If there is no minyan of individuals responding "Amen," the berachot recited by the Shaliach Tzibbur may be considered close to berachot levatalah, blessings said in vain.

Why do we repeat the Shemonah Esrei after the silent amidah? Originally, this enactment was instituted to assist individuals who were unable to pray on their own—either because they lacked the necessary knowledge or the ability to read the prayers properly. The repetition allowed them to fulfill their obligation by listening attentively and answering “Amen” to each blessing.