I'm mentally old and out of touch with the kids, there are new emojis all the time and I have no idea what any of them mean. I spent all this time learning English and now half of the things people post are some sort of picture puzzle I lack the context to understand and have to guess the meaning of.
Some older wiring and devices can interact poorly and cause fluctuating voltages. The more stable the voltage, the less wear on the components and vice versa.