Professional brand name which plays on the word "client".
The word "clieno" contains only six characters and three syllables. Three syllable names are used by established brands like Armani, Vodafone and Microsoft.
This domain was first registered in December 2016. Older domains have an advantage when ranking in search engines.
Clieno.com is a .com domain. Dot com domains are the most desirable top-level-domain in the world, famously used by websites like google.com. When you own a .com, it is much easier to rank for your own name in search engines.