Mangrove's order book may be cluttered over time with irrelevant orders when the market conditions evolvent. Therefore, bots (or Keepers) are continuously scanning the book. They are responsible for detecting failing offers and making them fail on-chain by "sniped" them, with a gas price set such that the offer's bounty compensates for the spent gas. They act as guardians of the Mangrove ecosystem. 🤖
Keepers are also in charge of keeping the gas price updated to determine the remuneration of takers for removing a failing offer from a list.