Ethereum: Didn't have a clue. Read about a third of the article, and still...not a clue,so:
This is the best definition I found from --
https://blockgeeks.com/guides/what-is-ethereum/ [A learners guide]
"What is Ethereum for beginners?
At its simplest, Ethereum is an open software platform based on blockchain technology that enables developers to build and deploy decentralized applications."
The Wikpedia article is gibberish. The above website is great.
And, the true Ethereum web site is --
https://www.ethereum.org [Impressive looking site...haven't explored it yet.
Now that it starts to make sense, back to the article posted in first post.
Mike