Why use a hook when winching??

[BrazilianY60]

If you have a moused hook then don't use a shackle just put the strap loops into the hook.
If you have a hook that is attached by a clevis pin or otherwise to the winch line then take the hook off, stow it somewhere and use the eye, you will find you will use the eye more often than the hook anyway.
If you use the hook beware you don't tip load it IE make sure the load is inline with the winch cable pull.
If you use shackles then use D for Chain and Bow for Straps
If you attach your winch line to the shackle pin then you may want to pack the shackle pin so the line is centered esp if it is a metal thimble

A lot of unknown vocabulary here for me. Can someone help me understand these?

"If you have a moused hook..." What type of hook is that?

"If you have a hook that is attached by a clevis pin..." I kind of think I know this one, but I'd rather confirm... Is this that pin that is locked by an aluminium wire similar to castle nuts locking pin?

"If you use shackles then use D for Chain and Bow for Straps" This one I am completely lost.

"If you attach your winch line to the shackle pin then you may want to pack the shackle pin so the line is centered esp if it is a metal thimble" What does he means with pack the shackle pin?

Thanks!