The product is a set of flashcards titled “NEW ~ Knock Knock SLANG FLASHCARDS 40 Terms To Get You Legit Overnight ~ Cards” created by the author Knock Knock and published in 2021. These flashcards focus on slang terms, with a total of 40 terms included in the set. Designed to help users become more knowledgeable about contemporary slang, these flashcards are a valuable resource for anyone looking to improve their understanding of informal language and street jargon.