Ranked in these QuestionsQuestion Ranking
Pro Easy to use
Nano includes only the bare minimum of functionality needed to edit documents making it very simple.
Pro Built-in cheat sheet for shortcuts
All command characters are shown at the bottom of the editor.
Pro Available on almost every Linux system as default
Almost like vi (vim), you can find nano on most Unix-like systems.
Pro Lightweight and bug free
Very stable editor that never hang / leak or crash
Pro Most of the languages supported
Syntax coloring is available for most of the programming language.
Con Limited feature set
While nano is fine for writing emails and blog posts, it's probably not a good editor for programmers or really anyone that needs an editor more than once in a while.
Con Individual keybindings
You have to learn keybindings especially for Nano.