I don't know what NFT and ETH mean. Translate breh.
NFT - Represent digital files such as art, audio, videos, items in video games and other forms of creative work. Basically ppl are putting their art as tokens and selling it for a lot money on sites like opensea & rarible. The files are 1:1, not only are you the only one with it, but you have complete copyrights to the file.
You can only purchase an NFT with cryptocurrency.
Ethereum (ETH) is Cryptocurrency currently amounting to 2,007.33. Second highest next to Bitcoin.
300 ETH x 2,007.33 = $602K