The purpose of a lease rider is to provide additional terms, conditions, or clauses that are not specifically addressed in the main lease agreement. A lease rider is a document that amends or adds to the existing lease to include specific provisions that the parties involved want to include. This can include details about any modifications or changes to the lease, additional rules or regulations, or any additional agreements between the landlord and tenant. The purpose of a lease rider is to provide clarity and specificity on certain aspects of the lease that may not be adequately covered in the main agreement.