There are many ways to get permission from people. One of the best ways is to use a keyword. A keyword is a word a person texts to a number. For example, a business can have a sign that says, "Text DEALS to 555-555 for a free coupon." When a person texts the word, they have given you permission. Another way is to use a sign-up form. You can have a form on your website. The form can as... https://dataon.site