I know that. I meant that when you go to My Account there's the button on the top left corner that says "My Rank". And when you click it it says:
"Feature temporarily disabled. Sorry, it is too resource intensive. Must optimize before enabling."

Your rank is related to your level, and is upgraded/promoted (For lack of better word) every ten levels. Here's a full list of Ranks & Levels. For example, your current rank is Journeyman. Once you level up, you'll be an Expert. Nothing really special going on, just a bit of site fun c:

As for the feature you're talking about, that's nothing to worry about. It's currently disabled/unimplemented.