Third Party Questions Regarding PUN Code

Code (CSharp):

1.  
2. using Photon.Pun;
3. using Photon.Realtime;
4. using TMPro;
5. using UnityEngine;
6.  
7. namespace PhotonTutorial.Menus
8. {
9.     public class MainMenu : MonoBehaviourPunCallbacks
10.     {
11.         [SerializeField] private GameObject findOpponentPanel = null;
12.         [SerializeField] private GameObject waitingStatusPanel = null;
13.         [SerializeField] private TextMeshProUGUI waitingStatusText = null;
14.  
15.         private bool isConnecting = false;
16.  
17.         private const string GameVersion = "0.1";
18.         private const int MaxPlayersPerRoom = 2;
19.  
20.         private void Awake() => PhotonNetwork.AutomaticallySyncScene = true;
21.  
22.         public void FindOpponent()
23.         {
24.             isConnecting = true;
25.  
26.             findOpponentPanel.SetActive(false);
27.             waitingStatusPanel.SetActive(true);
28.  
29.             waitingStatusText.text = "Searching...";
30.  
31.             if (PhotonNetwork.IsConnected)
32.             {
33.                 PhotonNetwork.JoinRandomRoom();
34.             }
35.             else
36.             {
37.                 PhotonNetwork.GameVersion = GameVersion;
38.                 PhotonNetwork.ConnectUsingSettings();
39.             }
40.         }
41.  
42.         public override void OnConnectedToMaster()
43.         {
44.             Debug.Log("Connected To Master");
45.  
46.             if (isConnecting)
47.             {
48.                 PhotonNetwork.JoinRandomRoom();
49.             }
50.         }
51.  
52.         public override void OnDisconnected(DisconnectCause cause)
53.         {
54.             waitingStatusPanel.SetActive(false);
55.             findOpponentPanel.SetActive(true);
56.  
57.             Debug.Log($"Disconnected due to: {cause}");
58.         }
59.  
60.         public override void OnJoinRandomFailed(short returnCode, string message)
61.         {
62.             Debug.Log("No clients are waiting for an opponent, creating a new room");
63.  
64.             PhotonNetwork.CreateRoom(null, new RoomOptions { MaxPlayers = MaxPlayersPerRoom });
65.         }
66.  
67.         public override void OnJoinedRoom()
68.         {
69.             Debug.Log("Client successfully joined a room");
70.  
71.             int playerCount = PhotonNetwork.CurrentRoom.PlayerCount;
72.  
73.             if(playerCount != MaxPlayersPerRoom)
74.             {
75.                 waitingStatusText.text = "Waiting For Opponent";
76.                 Debug.Log("Client is waiting for an opponent");
77.             }
78.             else
79.             {
80.                 waitingStatusText.text = "Opponent Found";
81.                 Debug.Log("Match is ready to begin");
82.             }
83.         }
84.  
85.         public override void OnPlayerEnteredRoom(Player newPlayer)
86.         {
87.             if(PhotonNetwork.CurrentRoom.PlayerCount == MaxPlayersPerRoom)
88.             {
89.                 PhotonNetwork.CurrentRoom.IsOpen  = false;
90.  
91.                 waitingStatusText.text = "Opponent Found";
92.                 Debug.Log("Match is ready to begin");
93.  
94.                 PhotonNetwork.LoadLevel("Scene_Main");
95.             }
96.         }
97.     }
98.  

I am confused by what the code below actually does. Can anyone explain why this piece of code is required in simple terms?

Code (CSharp):

1.     if (PhotonNetwork.IsConnected)
2.             {
3.                 PhotonNetwork.JoinRandomRoom();
4.             }
5.             else
6.             {
7.                 PhotonNetwork.GameVersion = GameVersion;
8.                 PhotonNetwork.ConnectUsingSettings();
9.             }