Good attachment is where a parent develops a warm and loving relationship with their baby and where they consistently let their baby know that they are there for them. If a parent is able to provide secure attachment it means that the child feels safe and protected. The child can count on their parent to meet their needs.
When a baby is in the womb, important brain development is happening including the development of billions of cells. Only a small amount of these cells are connected to each other before birth such as the cells that are needed for a baby to hear and search for food. Most of the cell connections happen once a baby is born. In the first year of life the baby’s brain will be very much affected by the emotional experiences they have with those who care for them and this in turn will help with their development.
When the child has this experience over and over it actually 'wires' their brain to expect this will happen in other relationships. It also develops the frontal lobe which is the part of the brain that allows us to have empathy, to be flexible, to communicate well with others and make decisions.