Free bingo is basically access to free bingo games without having to spend any money. Free spins are a promotional tool many casino and slots sites use to get you through the door. A free spin is a free go on a slot machine, IE spinning the reels. Both free bingo and free spins come in many different varieties. A website may reward you through their VIP programme with access to various levels of free bingo games. Likewise, bingo and slots sites can often give you free spins bonuses when you wager a certain amount. Obviously, the context depends on the website in question.