It identifies Jesus with the "Name" of God (Yahweh) from the Old Testament.
"Therefore God exalted him to the highest place and gave him the name that is above every name, that at the name of Jesus every knee should bow... and every tongue acknowledge that Jesus Christ is Lord." Key Meanings Name Above All Names
Many believers use the name of Jesus as a source of healing, protection, and spiritual strength. Cultural Impact It identifies Jesus with the "Name" of God
The "IHS" monogram (representing the name of Jesus) is a common symbol in cathedral architecture. Name Above All Names