Can you explain what first, last, and security deposit mean in terms of renting a property?

First, last, and security deposit are payments made by a tenant to a landlord when renting a property. The "first" refers to the first month's rent, the "last" refers to the last month's rent, and the "security deposit" is a refundable amount held by the landlord to cover any damages or unpaid rent at the end of the lease.