Answer:
Hoofed frolicking.
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find.
It is the electronic version of junk mail or a salty meat in a can.
A hill full, a hole full, yet you cannot catch a bowl full.
Up on high I wave away but not a word can I say.
I am rarely touched but often held. If you are smart you'll use me well. What am I?