The term "YHWH" (pronounced as "Yahweh") is a noun that refers to the name of God in the Old Testament of the Bible. This name comes from the Hebrew letters Y, H, W, H, which are known as consonants. Because ancient Hebrew was written without vowels, the exact pronunciation is not completely known, but "Yahweh" is a common way to say it.
"YHWH" is an important term in the context of Judeo-Christian teachings, representing the name of God as understood in the Old Testament.