In Photon what is the difference between OnJoinedRoom() and OnPHotonPlayerConnected()

I'm having a problem calling the OnPhotonPlayerConnected(PhotonPlayer player) but I figured that it's very similar to OnJoinedRoom() and I was able to get my result using it instead. my question is what is the difference between both methods and when are they called in relative to each other? also any ideas on why my OnPhotonPlayerConnected(PhotonPlayer player) is not being called would be appreciated

    void OnCreatedRoom() { //this is called by the masterClient Only?
        Debug.Log("Room Created");
     }
 
     void OnJoinedRoom()
     {
         Debug.Log("Room Joined");
 
 
     }
 
     void OnPhotonPlayerConnected(PhotonPlayer player)
     {
 
         Debug.Log("playerJoined");
    
     }

only "Room Created" and "Room Joined" are being printed?