Why do ads pop up on Apple phones?

First check whether you have downloaded software containing advertisements. This kind of software will carry advertisements and appear at any time; just turn off the settings that can deliver advertisements.

In fact, this is not a "text message" sent directly to your mobile phone number, but an iMessage for Apple devices to communicate with each other. The sender and receiver are both Apple IDs.

This annoying method of pushing ads through iMessage has aroused the anger of many Apple users. The solution is also very simple, just remove your Apple ID in "Settings" - "Messages" - "Send & Receive", or just turn off the iMessage function.