What's the difference between SMS interception and blocking?

The difference between the two is actually not very big. Blocking information refers to the act of shutting out information, that is, refusing to receive information. The main purpose of shielding information is to avoid being harassed by such information. After blocking information, you don't have to pay attention to such information.

Information interception refers to the act of intercepting information, that is, intercepting relevant information in various ways. After intercepting information, it can be deleted.