@schreiblehrling ah yes, I just asked #ChatGPT and got this answer:
This is an example of yarn bombing, a type of street art that uses colorful displays of knitted or crocheted yarn or fiber rather than paint or chalk. It's wrapped around the trunk of a tree, creating a patchwork of different designs and colors. Yarn bombing is often used to add a touch of whimsy and vibrancy to urban environments.