malloc for a dynamic object, such as a linked list

for example if you have a struct:

struct node {
    int data;
    struct node* next;
};

We must free memory for the node that has constant memory or a multiple of itself:

struct node* new_node = malloc(sizeof(struct node));

In a file containing the previous struct, we define the head:

 Node* head = NULL;

The head is the first node and then they are linked there.

No memory is released for the head, but for the nodes it is.