Direct URL helps you to redirect a user into correct context of a conversation. It's very useful to set as Call to Action for various Social Media or Online Advertisements. If you would like to include it in SMS promotions then you can use a link shortening service like https://bitly.com/
You can get the direct link of any smart reply questions by clicking the Link icon as shown below
A popup window will open as shown below;
Click the text box and the direct url will copy into the clipboard, now you are ready to use the direct url in your SMS & Social Media Campaigns.