Ends on a set date (Fixed Term) - A fixed-term tenancy for some fixed period of time. It has a definite beginning date and a definite ending date. and doesn't usually require notice to terminate the lease.
A fixed term lease provides certainty since the terms, including rent, cannot be changed for the agreed term unless the Landlord specifically reserves the right in the Lease and the tenant agrees to the changes.
Has no set end date (Automatic Renewal) - A lease that will renew automatically year to year, month to month, or week to week, is an estate that exists for some period of time determined by the term of the payment of rent. This type of lease will continue until a party chooses to terminate the lease.
To terminate the automatic renewing lease, the Landlord or Tenant must give notice of their intention to leave as required by law. If the tenant fails to move out at the end of the notice period, the Landlord can start eviction proceedings against them.
The Landlord can also raise the rent or change the terms of the automatic renewing lease by providing the tenant with proper notice as required by law.