What is an SMS marketing campaign?
An SMS campaign is one message sent to a list, on purpose. It has a reason, a moment, and a way for people to stop. Texting a customer you are already in a thread with is a conversation. A campaign is the send that starts a lot of those threads at once.
The pieces
Who. People who agreed to receive texts from you. The sheet needs a name and a mobile number, and any field the message will quote has to read like part of a sentence. How the file should look is a short checklist.
What it says. One action. Who it is from, in the first line. A working STOP on a marketing text. Writing one is mostly cutting.
When. Now, on a date, or spread across a few days so the replies do not all arrive in the same hour. Those are different campaign types in Entrance: single blast, scheduled, burst, and personal.
What happens to the reply. The message you sent stays in the thread next to the answer. Someone on the workspace takes it, or a personal campaign assigns it to the sender. If you have not decided that, you do not have a campaign yet. You have a blast.
How they stop. Reply STOP. The opt-out stays on the account. A campaign that makes unsubscribing hard will get reported, and registration does not override a spam complaint.
What it is not
It is not a drip of unrelated promotions under one name. Each send is its own campaign, with its own result: delivered, replies, clicks, stops. Mixing three asks into one text makes those numbers useless, because you cannot tell which ask anyone answered.
Running the first one is the same list, in order, inside the product.