Answer:
I am the noise Santa's reindeers make
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
People make me, save me, change me, and raise me. What am I?
What language does a billboard speak?