Patience can mean several things but in essence it means waiting. Waiting for that "right" moment to add something to a scene or to capture the right moment or emotion.
Sometimes a street scene can be quite empty and just needs a passer-by to liven it up.
Sometimes a landscape just needs the right light, a break in the clouds.
Sometimes you just need a person or an animal to turn and look into the camera so you can focus on the eyes.
Whatever it is, patience is required to wait until the right thing happens. Take your time and you will be rewarded with a better photograph....