Leasing involves the periodic payment of rentals in exchange for the right to use an asset for a fixed period of time. There are advantages to both the lessor and lessee. For the lessor, it provides a stable business and opportunities to sell spare parts or the asset after the lease term. For the lessee, leasing allows for efficient use of funds without capital investment and a potentially cheaper source than outright purchase. Both parties must consider factors like taxes, costs of capital, and break-even rental rates to determine if a lease is financially advantageous.