What is a lease?
A lease is a legal document which is effectively a tenancy agreement. And what that sets out is the rules by which you as a tenant live in that property, and by which the landlord has to give you, for example, they can't leave you in a property that is flooded. Likewise, you can't have parties every night and disturb the neighbors. It sets out rules like that by which the landlord will abide by, and you will abide by.