Bereavement policy in HR refers to a category of leave for employees when they experience the death of a loved one. This leave is granted to them so that they can:
Grieve and mourn the loss of the loved one.
Get over their deaths.
Prepare for/arrange a funeral.
Any activity that requires their presence
There must be a clear distinction between bereavement leave, sick, and vacation leaves. So it should be clearly described and outlined when designing any policy.