AMM / Automated Market Maker in one sentence: An AMM is a DEX design that prices token swaps using liquidity pools and formulas instead of a traditional order book.
An automated market maker is the mechanism behind many wallet-based token swaps. When you trade on a pool-style DEX, you are usually swapping against a smart contract rather than another trader’s visible bid or ask. Beginners meet AMMs when an interface shows pool liquidity, price impact, and slippage tolerance before confirming a swap.
How it works
Liquidity providers deposit pairs of assets into a pool, such as Token A and Token B. The AMM uses a pricing formula to decide how much of one token you receive when you add the other, and the pool balance shifts after each trade. Larger trades move the pool ratio more, which usually means higher price impact and more slippage.
Why it matters
AMMs make it possible for new tokens to trade without waiting for a centralized listing or a full order book of market makers. The tradeoff is that execution quality depends heavily on pool depth and token quality. Beginners should check whether the pool has real liquidity, whether the token is legitimate, and whether the quoted output still makes sense after fees and slippage.
Use it in a sentence
Example: “This DEX uses an AMM, so my large swap changed the pool price and created noticeable slippage.”