system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - what is it about wood glue that makes wood glue specifically made and perfected for wood?

Also, why does it smell so good/weird?
gpt
It penetrates into the fibres a little better and then it expands a little bit to hold tight. Assuming you glued it correctly, it will be able to use the grain structure and the pressure generated while curing a little bit like liquid in an aluminium can, the pressure from the liquid makes it hard to crush. Plus, it now has a MASSIVE amount of surface area that it's holding onto.

Properly done, the wood will break before the glue fails. You can glue things incorrectly and have only a surface bond, which can be ok, but can be pried apart by hand.

An additional feature, you can achieve similar effects to the above with epoxy and other glues, is that it dries transparent, and can also be found in forms that dry close to the colour of the wood, making it less obvious a repair was done or the wood was glued.