What is this ‘admin make wiki’ button?

[redxlaser15]

When I press the triple dots next to one of my own posts (not just any bodies), this wrench pops up. When it does, it says ‘admin’, then ‘make wiki.’
I have no clue what that’s about, and I didn’t want to test it out myself and accidentally do something stupid. I do enough stupid stuff as it is.

[kuros]

Given that this is the third self-depreciating post of yours I’ve seen in the last 24 hours, I think it’s worth pointing out that I don’t get that button. You have permissions on this website that other people don’t.

Thought you might appreciate thinking about that the next time you feel like you’re being unfairly targeted.