This article <http://www.eliyah.com/yahweh.html> claims that Yahweh is simply a third person form of Hayah (to be). The first form is Ehyeh. Just like the word "be" in English is rarely used and become am, are, and is if the subject is first, second, or third person, so is the word hayah in hebrew, according to that article.

According to the article, God doesn't really have a name. Yahweh simply means "He is".

Is this true?

However, that would be strange.

If Yahweh simply means "He is" what's the point of hiding the sacred name given that I am sure everyone must have been saying it all the time in natural conversation like "He is cooking. He is swimming. He is running" etc.

What's Judaism's perspective on this?

Am I understanding this correctly?