Static IP - Or fixed IP. It is assigned, secured, secure to the computer. In other words, he is like his wife or husband, you marry him and live the rest of your life with him, So Static IP works, when the computer enters the network it will have its own address, ie the fixed IP.
Dynamic IP - It is configured for when other computers enter the network, have it distribute other IPs. He's like a teenager going to party A, picks up several women. The other day is going to party B, and picks up several women. Understanding this, we take away that every party he goes he will pick up different women, as soon as the Dynamic IP works, every time the client enters the network it will give a new IP address.