Galvanic isolation is when two electronic devices are separated by a physical barrier to prevent any electrical current from flowing between them. It's like putting a fence between two yards so that the dogs can't run into each other's spaces.
In electronics, the barrier is usually made of materials that don't conduct electricity very well, like plastic or ceramic. This barrier is called an "isolation barrier."
By using galvanic isolation, we can protect sensitive electronics from electrical interference, voltage spikes, and other unwanted electrical signals that could cause damage or affect performance. It's like wearing a shield to protect yourself from a storm.
Overall, galvanic isolation is an important technique used in electronics to keep devices safe and running smoothly.