Refers to a simple hand puppet made from a sock or stocking, often with sewn-on features. Used in children's crafts and entertainment.
The children made sock puppets and played with them.
sock puppet (fake online account)
Internet slang for a pseudonymous account used to deceive or manipulate online discussions. Often used in the context of social media or forums.
On that forum, one user was manipulating the discussion using multiple sock puppets.