How do I stop all the advertisement messages

The reality is that you are not going to be able to completely stop all advertisement messages and emails. You can take some control on these emails and messages by marking them as Junk/Spam. On the Messages side, you can block contacts etc. As of today, there is no foolproof method or a service available to completely stop ALL.

Axel F.

Jessie5680 Said:

"How do I stop all the advertisement messages"

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Creating eMail Filters:

Contact your eMail provider, asking them how to filter out eMails. You'd easily create these on their Website.

Blocking Out Spammers:

Use Malwarebytes Mobile Security. The free version blocks popups. The paid version blocks out known spam numbers. So, consider using it. Read the following post to see how to use this software: Blocked numbers - Apple Community