1. Log into Showdigs
2. Click on the relevant property
3. Identify the "Landing Page URL" in the property's showing profile. Copy that link (showdigs.co/xxxx), and put something along the lines of "TO SCHEDULE A VIEWING, GO HERE: showdigs.co/xxxx".
4. Here's an example of where you should put the link in your description. Note that it is separate from other text and it's in multiple places throughout the ad: