Voltage fluctuation at home refers to the variation in electrical voltage levels, either higher or lower than normal, that can affect household appliances. These fluctuations can be caused by issues like power grid instability, faulty wiring, high-powered appliances, or electrical interference. They can lead to problems such as damage to electronics, reduced appliance lifespan, and inconsistent performance. Using voltage stabilizers, upgrading wiring, and avoiding overloading circuits are common solutions to prevent these fluctuations and protect home appliances.