What is parsing?

[Naaura]

It's normal paying attention you say but you also just admitted to being unable to tell when someone is underperforming? Mmh...

Something that's useful is parsing and putting your numbers through xivanalysis to figure out what's going on and what to work on.

I cant tell number by number no! Of course not!

Normal environmental awareness, absolutely yes!

This seems like something that may keep the community quite divided if parsing is so important for progression...