What is Junk SMS
Junk SMS or also more commonly known - SMS spam - is any unsolicited text message communications from a brand or online store.
Why does Junk SMS matters
Junk SMS matters in the context of "What Not to Do".
In the United States, Junk SMS have been illegal under the Telephone Consumer Protection Act since 2004. Citizens who receive unsolicited SMS can now bring the solicitors to small claims court.
Since 2019, unsolicited marketing communications, whether through SMS or email, has also been deemed uncompliant with EU's regulations through the GDPR (General Data Protection Regulation).
However, even if this practice wouldn't have been illegal, there is no benefit for brands to send unsolicited spam SMS - your attention should be focused on providing value.