What results does showStatistics throw me in scenekit?

I don't have much experience in scenekit, I'm actually working in project in a using scenekit, I'm creating sceneView and adding configurations for my project, but I don't know what's the 'showsStatistics' propiety meaning

My code it's similary this

var sceneView: SCNView!
var scena = SCNScene()
var nodeInitial = SCNNode()
var arrayNodes = [SCNNode] ()


override func viewDidLoad() {
    super.viewDidLoad()
        nodeInitial = SCNScene(named: "art.scnassets/world.dae")!
        for node in nodeInitial.rootNode.ChildNodes as [SCNNode] {
               arrayNode.append(node)
        }
        scene.rootNode.addChildNode(arrayNode.last!)
        sceneView.scene = scene
        sceneView.allowsCameraControl = true
        sceneView.showsStatistics = true
}

The results throw at me

The part of left I understand that it makes reference to model propieties, but the part of right I don't know and every time I add elements it increases values and when I delete all the nodes it also increases