http://whirtorrgetftvz4g466sjqkegtyi35bjl4bvotfkfossunf5my4x6ad.onion/blog/what-is-a-bitcoin-mixer
Since all of this can be still pretty complicated or hard to follow for some, let’s see how Bitcoin mixers work in a simplified real-life example. Imagine a pool full of 100-dollar bills. You also put a 100-dollar bill right into the pool, walk to the other side of the pool, and just randomly take one 100-dollar bill back from it.