Neglect in health and social care means that a person is being mistreated when they need care and rely on others for the care.
For example if you're caring for an adult that needs care and you fail to provide them with food, water, clothing, fail to keep them bathed, change in clothes or don't provide them heating or a roof over their heads then that could be neglect.
The same with a child when it comes to child neglect.
As a parent you're responsible for the care of your child and if you fail to provide proper care for that child then you can be charged with neglect of a child.
Neglect of a child means that you fail to keep them clean, don't provide them with clean clothes, don't feed them, don't keep food in the house for them, not allow them to shower or don't force them to shower or bathe etc.
Also not taking your child to the doctors appointments or not taking the child to the hospital when they need to is also child neglect.