This epic song is not just one of many beautiful songs about Jerusalem. It is THE song about Jerusalem. Every single Jew knows this song from somewhere in their life. More importantly, it conjures up all of the most hidden yearnings of the Jewish people for a rebuilt and beautiful Jerusalem.
What it really signifies is the age-old yearning for a deep connection between man and G-d via the local call that Jerusalem provides.
Almost everyone who prays to G-d at the Western Wall feels something stirring inside of themselves. That special feeling is one of the connection between G-d and the world.