Wasabi Wallet v2.4.0 has been released four hours ago. I don't think there is any tutorial yet. I'm sure a few people are already trying it out and someone will publish a little something soon. :-)

From the release notes, basically, you send to Silent Payment addresses, which are privately reusable static addresses. While sending Bitcoin to them is as easy as sending to regular addresses, it is not possible for an observer to link several payments to the same Silent Payments address.

They are useful to send an address to multiple persons at the same time (tips, donations...) or to make multiple payments between the same entities (salary, rent...).