How does Apple block spam messages?

Apple's methods of blocking spam messages are as follows:

Tools/materials: iphone 13, IOS 15.

1. First find the information on our mobile phone desktop, and click.

2. Then click on the spam we received.

3. Then click the contact at the top of the screen.

4. Then click the exclamation point on the screen.

5. Then click the triangle to the right of the contact.

6. Then click to block this calling number.

7. Finally, click Block Contacts.