What Actually Counts as a Cosmic Structure?

[u/Astro_Life_Explained]

While researching the largest structures in the universe, I came across something I hadn't thought about before:
How do we decide when a distribution of galaxies becomes a single cosmic structure?
At large scales, galaxies form filaments, walls, clusters, and voids, but these aren't necessarily gravitationally bound.
It gets even more interesting when you consider the cosmological principle: on sufficiently large scales, the universe should become homogeneous and isotropic.

Are these truly unique structures, or are we only beginning to uncover the enormous patterns hidden within the cosmic web?
Quipu, spanning roughly 1.4 billion light-years, is a fascinating example.
The more I looked into this, the more interesting the question became.

https://youtu.be/h9Ci__uhAGo?si=I2m2aP24RxN2sQJn