Google Messages is gaining a new “Unsubscribe” feature to combat spam and other unwanted SMS texts or RCS chats from business senders.
“Unsubscribe” is for businesses that send “unwanted messages in Google Messages, like promotions and other non-essential content.” The new button can appear at the bottom of the chat (just above the text field) or in the conversation’s overflow menu. 
Google explains how Unsubscribe applies to: 
SMS
RCS
A sheet then slides up asking “Why are you unsubscribing?”: Not signed up, Too many messages, No longer interested, Spam, or Other. In the case of spam, there’s a “Report this sender” option. 
Behind-the-scenes, Google Messages sends “STOP” to the sender from your number. Afterwards, “you should no longer receive non-essential messages from that sender,” but:
Go to the overflow menu if you want to “Subscribe” again after the fact. We’re seeing Unsubscribe with the latest stable release of Google Messages (version 20250409_01_RC00).
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