The bells have symbolic meanings in religion. I did some research and here I'm sharing with you a list of three religions with the symbolic meanings accordingly:

Christianity:

In Christianity, the bell is said to represent the ‘voice of God.’

Hinduism:

The Hindu Goddess, Saraswati, the bringer of knowledge and wisdom, is associated with the bell. The reverberation of the bell is used to help worshippers disengage the mind so that it becomes receptive.

Bhuddaism:

The resonance of a bell signifies ‘pure wisdom’ because the sound is one of perfect harmony and clarity.