Self-explanatory brand name for a product or service that deals with photography / pictography.
Pics has only four letters and only one syllable. Mono-syllable names are highly rare and exceptionally desirable. Leading companies using one syllable names include Dell, Ford and Square.
Pics.co is a .co domain. Dot co domains are a popular top level domain (TLD), like dot com, or dot net. This domain extension has become increasingly popular among tech start-ups, including Twitter (t.co).
This domain was first registered in September 2010. Older domains have an advantage when ranking in search engines.