WWW, while convenient to type, is rather unwieldy when spoken (at least in English). “Double-U double-U double-U dot some site dot com” takes a while to say. It’s not like, say, AAA, which can be easily spoken as “Triple-A.” Fortunately, these days most major sites have their servers configured to return the same web with or without the www. prefix, so you sometimes hear a website described with just its domain name.
This morning I caught the end of an interview on NPR’s Marketplace Morning Report, and the announcer explained that the full version of the interview was available on their website, “dub dub dub dot marketplace dot org.”