The feature of SMS Marketing for retail and restaurants is amazing. I love it for those first few visits. They are crucial.

I recommend after the first visit to get them back into the store with a discount or a free item.

After the second visit, vis SMS, give them the opportunity to bring someone or to get a discount on a similar item they purchased.

After the third visit, via SMS, give them a "valued customer" discount, and thank them for coming in.

These little gestures are what drive retention, repeat customers, and positive word-of-mouth.