We are still uncertain about what a wavefunction actually is but recent measurements are starting to make this picture clearer. This problem has been around since the beginning of quantum mechanics. Albert Einstein, Neils Bohr, Werner Heisenberg, Erwin Schrodinger, and many more famous physicists have struggled with this problem but no one has come up with a definitive answer.

In this video, I discuss some of the interpretations of quantum mechanics and how these new measurements change some of our theories.

There are many great videos about interpretations, check out references [6] and [7] if you want to know more.

— References —
[1] https://www.quantamagazine.org/physic…
[2] https://www.nature.com/articles/s4156…
[3] https://journals.aps.org/prl/abstract…

Quantum Interpretations.
[4] https://iep.utm.edu/int-qm/
[5] https://www.scientificamerican.com/ar…