Do you know the name of this kind of element that is usually used in web design?
Searching around I have a feeling that it doesn't really have a specific name, just "column design" or something. The reason I'm asking this is to have a deeper understanding on the illustration of this specific element. Illustration art in general, and website illustration art in specific are not something new, see for example this video about illustration art, and this article about illustration styles in web design. However, in this specific element, there is not much room for details, and both those links don't emphasize this constrain at all. Illustration artists can still work on this element, but I think until we have a concept for it, it will be hard to solidify our skills.
The image below is another example on the need of concrete knowledge of this kind of illustration: it needs to carry an amount of sophistication and subtlety, while being constrained in a small amount of space (it's actually the mission of my project):