I've worked as a web developer for two years now and I have never had to understand or apply Big O notation or a bunch of things on that list. Ive looked at articles about Big O a bunch of times but I never have had to use it in any meaningful way. I've learned a bunch of other stuff not on this list.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.