First of all, let us explain what the term "slot volatility" actually means:
Slot volatility, A.K.A slot variance, refers to the amount of risk and reward associated with a specific slot game. In a nutshell, without all the jargon, volatility tells you how often you can expect to win and how big those those amounts will be.
A low volatility slot is a slot that is considered more "low risk" as they pay out more frequent wins but in smaller amounts. These slots are recommended for customers who want to enjoy a steady flow of wins and want to stretch their bankroll as bet amounts an be kept small.