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Once the grounding rod has been driven into the ground, you need to connect it to the electrical system of the building. Pull the grounding electrode conductor up to the top of the grounding rod, making sure it is long enough to make a permanent connection between them.  Give the grounding electrode a little bit of slack, so it's not extremely tight where it connects with the grounding rod. This will ensure that if it gets hit or pushed on, it won't get dislodged from the grounding rod. If the grounding electrode conductor has a sheath on it, the last 1⁄2 inch (1.3 cm) should be cut off, exposing the wire. There are specific clamps that are used to connect grounding electrode conductors to grounding rods. You will need 1 clamp. Put the end of the conductor and the end of the rod inside of the clamp and turn the screw on the clamp to press them together securely. These clamps are sold in home improvement and hardware stores. The ground bus is where all the ground and neutral wires are attached in the electrical panel. To make the connection, slide the end of the grounding electrode conductor through one of the holes in the bus and tighten the screw in that hole until it holds the wire very tightly.  In some cases, the ground wires will be connected to the ground bus and the neutral wires are connected to the neutral bus. These 2 bars are then connected with a main bonding jumper. If this is the case, you can attach your grounding electrode conductor wherever it fits on either bus.  You need to be very careful when you are doing any work in an electrical panel. Make sure that your fingers, tools, and the grounding electrode conductor don't make contact with the energized bars in the panel, which are located behind the circuit breakers. If you are unsure about how to make this connection safely, hire an electrician to do the work.

Summary:
Pull the grounding electrode conductor to the grounding rod. Clamp the grounding electrode conductor to the grounding rod. Connect the grounding electrode conductor to the ground bus.