The main thing is to use short links because long URLs can break or look messy when they show up in text messages. Services like Bitly or TinyURL can help you shrink your links into something clean and clickable. You should also test your links on different phone types before sending them out to customers. Sometimes a link works fine on an iPhone but acts weird on Android, or the other way around. Make sure the page your link goes to loads fast and looks good on mobile screens, because if it takes forever to open or looks broken, people will just close it and forget about your message.