I use only one snippet both before and after integrating copilot (provided by my employer) into my workflow, which is for creating a empty arrow function (in JavaScript / TypeScript.)

Copilot have not been able to generate arrow functions when I intend to, in my experience. I found it pretty incompetent, and unable to provide relevant assistance if there is any bit of abstraction. YMMV.

I reckon my need for this specific snippet could be replaced with a more competent agent. I recently subscribed to cursor and so far it seems promising.