The pulley is located on your washing machine's tub and is a wheel that is essential for rotating the drum.
If it is obstructed or bent, the pulley can make the belt work loose and stop the washing process from proceeding properly.
With use, this pulley can crack, in which case you will hear noises when the drum spins.
In order to avoid your wash quality deteriorating and to ensure your washing machine's drum spins optimally, you should consider replacing your pulley. We have many drum pulleys and drum spiders available here which will suit your model of washing machine.