confusion in ViewModel and model in Asp.net MVC

Question

public class Attendance

{

[Key]

[Column(Order = 1)]

public int GigId { get; set; }

 

[Key]

[Column(Order = 2)]

public string AttendeeId { get; set; }

 

 

public Gigs gig { get; set; }

public ApplicationUser Attendee { get; set; }

 

}

in above Model: we need GigId and AttendeeId .

we are defined in list

but why create object of same class:

public Gigs gig { get; set; }

public ApplicationUser Attendee { get; set; }

 

this is ViewModel or Model ???