Screws are used in woodworking to join parts, with the main benefit being that the parts joined using the screws are easy to disassemble. Screws allow room for expansion without interfering with structural integrity. A typical woodworking screw will have the following sections:
This is where the threads you see on the screw are based. The shank drives into the woods to join the parts.
The threads are made on the shank to allow easy driving of the screw into the woods and come in different sizes.
This is the topmost part of the screw.
The pointed part which points to the wood before you start driving the screw.