One can find bells made of brass in every temple in India. The bells form a significant part of temples and have are of great importance.
We often ring the bell as soon as we enter the temple. Even while performing the Aarti, the bells are rung continuously.
A puja is incomplete without the ringing of the bell.
If you are wondering what the significance of bells in temples is and why they are important, watch the video know the answers to your questions: