Qualifio generates Smart URLs for your campaigns. The generic format of those is qlic.it/ followed by a 6-digit number, e.g. qlic.it/123456
You can customise this URL if you have a domain/subdomain with a CNAME redirection to player.qualifio.com (More info).
Once this condition is met, go to Settings > Websites and edit the desired website. Under the "Facebook" tab > Smart URL, you need to copy and paste your domain or subdomain:
By default, the Smart URL generated within the tool will start with your domain, then a six-digit campaign ID: