In the documentation page for my team's product, there are some articles under the same header that are fairly friendly but some that are definitely not for beginners. My employer wants something that doesn't need to be clicked to show the difference between a normal or advanced article.
I was considering a hover pop-up, but then that means the user can't take in the links and immediately tell what's advanced or not. Another option is to place the words "Advanced" (kind of like an icon) right in front of the icons.
Another issue to contend with is that everyone who visits this documentation page is a software developer of some sort, so is it even necessary to differentiate between the different types of articles?