Mixed cryptocurrency transactions now represent 4% of all bitcoin payments, with so-called “CoinJoins” rising by 300% in just nine months. By blending multiple transactions together before they are sent to the recipient, the sender’s details can be obscured.

CoinJoins have become more popular as more monitoring of transactions on blockchain are occurring.  Read more here at:

https://cointelegraph.com/news/mixed-cryptocurrency-transactions-up-300-as-crypto-users-pursue-anonymity