"Wud-up" business name could stand for a slang of "what's up".
The name "Wudup" has only five characters and just two syllables. Two-syllable names are exceptionally rare and exceptionally desirable. Leading companies using two syllable names include Walmart, Google and Walgreens.
This domain was first registered in December 1999. Older domains have an advantage when ranking in search engines.
Wudup.com is a dot com domain. Dot com domains are the most valued top-level-domain in the world, used by famous websites like google.com. When you own a dot com, it is much easier to rank for your own name in search engines.