There is always an easier way to explain Bitcoin but the problem is the understanding of the target person. The easiest way is to say that Bitcoin is like money, it can be transferred, can be bought, can be gift, and can be used to buy merchandise. Anything that is beyond introducing Bitcoin as money will complicate things. So if anyone wants to explain Bitcoin in a simple term, just tell them Bitcoin function like currency that is why it is called cryptocurrency.
Then such an explanation will immediately raise a counter question, why do we need bitcoin if it performs the same functions as fiat money? Obviously, such an explanation will not be enough for a complete understanding. Bitcoin is too complicated a topic to try to explain something to a person who is not familiar with cryptocurrencies. In addition, there is enough information on the net so that everyone can, if they wish, study everything that interests them, I think this will be an even better option.