Your knowledge bank will start off with a domain that ends with: kb.kundo.se. You can choose to change it to your own subdomain. How to create a subdomain.
Subdomain is not automatically included in all accounts. If you are interested in using a subdomain contact your Customer Success Manager or email firstname.lastname@example.org to see if you have access to it.
If you do not want your visitors to leave your website when they navigate to the knowledge bank, you can integrate it so it is perceived as part of your website. How to integrate your knowledge bank
Both guides are technical guides and usually carried out by an IT-department.