What is the correct way to use Vector3.Lerp?

I have a box object that moves according to key presses. When I converted the game to client/server networked version, the position of the box is reflected in the clients. However the box jumps from position to position. I tried using Vector3.Lerp but the box slides a distance and then jumps.

What is the correct way to use Vector3.Lerp?

The UNET tutorials contain a good way to use Lerp to help with syncing players over the networking system.

https://www.youtube.com/watch?v=NLnzlwCRjgc