This four-letter domain is distinctive and easy to pronounce and spell. It sounds like "ducks", which leads to obvious branding opportunities.
As an abstract name this could almost anything, including a physical product (e.g. cleaning, pharmaceutical) website or app (social, health).
The name "duxs" has only four characters and just one syllable. Mono-syllable names are extremely rare and exceptionally valuable. Established brands using one syllable names include Dell, Box and Shell.
Duxs.com is a dot com domain. Dot com domains are the most popular, and the most prestigious. A dot com is the first thing people think of when they think of a website.
This domain was first registered in April 2005. Older domains have an advantage when ranking in search engines.