When you report a conversation as spam, you also block the sender and move the message to your "Spam & blocked" folder. Google employees and contractors may also review your spam information to help improve Google’s spam and abuse protection for Google Messages and Google’s other products and services. Reported conversations are also used to train AI models to improve spam and abuse protection.
- The spammer’s phone number is reported to Google.
- Google gets a copy of the last 10 incoming messages from the spammer so we can improve spam detection. In a group conversation, this can include messages from users other than the spammer:
- Each reported message includes the sender’s phone number and a timestamp of the message.
- Each reported message sent with rich communication services (RCS) includes an identifying RCS Message ID.
- Each reported RCS group conversation includes an RCS Group ID.
- Your country code based on SIM card and IP is reported to Google.
- Your past replies to the spammer aren't sent to Google.
- Your name and phone number aren't linked to the spammer’s messages.
- The spammer can’t view your report and won’t know about it.
When Google Messages detects a message as spam, that message can be dropped and senders can be suspended if found to violate the Google Terms of Service.
Block & report a conversation
- On your Android phone or tablet, open Google Messages
.
- Touch and hold the conversation you want to report.
- Tap Block
Report spam
.
Block from inside a conversation
You can also open a conversation and report it as spam.
From the conversation, tap More options 
Tips:
- The contact is reported as spam and the message is sent to your “Spam & blocked” folder.
- You can report spam but don't have to block the contact.
Remove a spam report
Unblocking a conversation removes a spam report.
- On your Android phone or tablet, open Google Messages
- Tap your Profile photo or icon
More options
- Tap More options
- Find the contact in the list and tap Remove
- Otherwise, tap Back
.
- Otherwise, tap Back
More options 
.Tip: When you unblock a contact, the spam report is removed and the conversations are put back on the Home screen. Learn how to clean up conversations in Google Messages.