I'm reading on chain tensioning, the generic idea is that if the chain is too loose it will fall off, if it's too tight it will "bind".
I'm having an hard time understanding what "bind" means in this context. The best I could think of is that the teeth from the cog will be tight to the chain causing both teeth and chain to wear out more easily, but I couldn't find any proof.
These are the sources I was reading:
one is a question on Bicycles:
The simple answer is, as Sheldon brown says, as tight as possible without binding.
Second is on Brown's blog:
If the chain is too tight, the drive train will bind, perhaps only at one angle of the pedals (chainwheels are not usually perfectly concentric). It should be tight as it can be without binding.