What's the difference between the verbs "llevar" and "traer"?

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LLEVAR vs TRAER
LLEVAR
This verb means "to take", such as when an object is being taken (generally by
you) to a place other than where you are.
o Le voy a llevar el cuaderno a mi padre
(I'm going to take the notebook to my dad) = I have the notebook and
I'm going to take it elsewhere to give to someone else.
o Llevo a mi novio a la fiesta.
(I'm taking my boyfriend to the party) = My boyfriend is here, and I'm
taking him with me to the party.
o Te van a llevar las cervezas.
(They're going to take the beers to you) = They are here right now, but
they are going to take the beers to you.
TRAER
This verb means "to bring", such as when an object is being transported to the
place where you are.
o Miguel me va a traer las llaves
(Miguel is going to bring the keys to me) = Miguel is going to bring the
keys to me. He has the keys and he's going to bring them to wherever I
am.
o Mi novio trae comida a la fiesta
(My boyfriend is bringing food to the party) = My boyfriend is bringing
food with him to the party that I'm already at.
o Trajeron las cervezas.
(They brought the beers) = The brought the beers with them to
wherever we were at the time.