standard front-running stuff. you can see the transactions that are in the mempool, you can either submit your own higher-fee transaction (likely to be included before theirs) or if you're a miner you can try to mine blocks with your transaction included and theirs specifically excluded so that yours goes first.

that essentially tells you that the price is about to go up or down, so you can make money on the movement.

https://cointelegraph.com/news/front-running-flash-bots-and-...

https://coinmarketcap.com/alexandria/glossary/miner-extracta...