Liquidity Providers
A liquidity provider is a user who funds a liquidity pool with crypto assets they own to facilitate trading on the platform and earn passive income on their deposit.
By using a crypto exchange liquidity provider, an exchange or a broker can offer a tighter spread to the customer.
See More
https://academy.binance.com/en/articles/what-are-liquidity-pools-in-defi
https://www.gemini.com/cryptopedia/liquidity-provider-amm-tokens