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 word "duxs" contains only four characters and only one syllable. Single-syllable names are exceptionally rare and exceptionally desirable. Established brands using one syllable names include Square, Box and Nike.
Duxs.com is a dot-com domain. Dot com domains are the most valued domain extension in the world, famously used by websites like twitter.com. 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.