What is Silca used for?

[Beau Phos]

I find it in bags, shoes, everything. What is it's purpose?

[Uber|nooB]

it's silica gel and it's used to keep stuff dry

[IplayAspy]

Meant to keep moisture out of packaging, for example Beef Jerky has it because it needs to stay dry otherwise it would be nasty moisturized.

[mike]

it's a dessicant.

[Bonk.]

it's awesome to melt and then shape it.