That you are using a mac? I ised to still call it the super or windows button, because my macbook ran linux. This whole article is mac centric, but it doesn't seem aware of that. Most keyboards don't have the switch symbol, most just say alt, and its where the mac has the command key.
> This whole article is mac centric, but it doesn't seem aware of that.
I found it pretty clear from the title, site affiliation disclaimer, background image, section headers, language, and overall theme of the article. What's misleading you?
It is on Swedish road signs indicating a sight/attraction/monument, usually an ancient one.
It is a stylised ribbon/snake pattern that resembles one that you could find on a rune stone. <https://xn--vgmrken-5wac.se/tag/sevardhet/>
A variation of the symbol is also the symbol for the National Heritage Board, which is in charge of protection of ancient monuments.
> Susan Kare states that she has since been told that the symbol was picked for its Scandinavian usage due to its resembling the shape of a square castle with round corner towers as seen from above looking down, notably Borgholm Castle.
The revisionist history is that it's a Swedish map symbol repurposed.
People who were there will tell you that it's called "double infinity" and was used because the regular infinity symbol lacked visual weight and it was thought might be too similar to other keys.