A will is a written legal document governing how all assets held in your individual name (as opposed to property titled in the name of a trust, jointly with others, passes via beneficiary designation, etc.) are to be distributed after your death. Among other things, t also specifies who should be the person that handles your probate administration, often referred to as your executor, in Florida known as your Personal Representative.
If you die without a will, the State of Florida provides certain default rules for determining how your assets will be divided, and who your beneficiaries will be. The court will also determine who will handle the administration of your estate.
Wills must conform to Florida law and must clearly and unambiguously state your intentions. Increasingly, people are tempted to use do-it-yourself or automated forms found online, however it is important to remember that a mistake which invalidates the will would most likely not be discovered until after your death when it's too late to correct, and which then results in costly procedures for your family, loss of control of the disposition of your assets, tax issues, or many other unplanned consequences.