Most social and messaging traffic reaches a store on a phone. A mobile-first Selstack Stack uses short copy, readable images and a simple order of offers so customers can understand the business without pinching, zooming or hunting.
Prioritise the first screen
Use a recognisable profile image, clear display name and one-sentence description. Put the most useful entry offer near the top instead of leading with every possible choice.
Design images for small screens
Use a strong focal point and avoid tiny text embedded in artwork. Open each image in the public view and use the full-image control when important information may be cropped.
Shorten forms and descriptions
Break descriptions into headings and short paragraphs. Ask only for details needed to complete the transaction; long questionnaires are especially difficult on mobile.
Test real customer paths
Check the Stack, offer, form and payment transition on at least one narrow screen. Confirm buttons remain visible above the browser toolbar and error messages explain what to correct.
Review How to Build a Mobile-First Online Store before publishing
Test the first screen, every offer image, field length and primary button on a real phone.
Avoid this: Do not rely only on a desktop editor preview or place essential information inside a cropped image.