I hope I'm understanding your question correctly—I'm gonna take a guess that you may want to try these two things!
Edit the name of your Landing Page:
Check out the name of the Landing page in the top left corner of the editor screen:
See the little pencil? Click there, and you can re-name your form however you like. This will change the name of the Landing Page internally, and also adjust what displays in the page title tag, or tab of the browser.
If this isn't what you're asking, you can also try this:
Account Settings > Domain
This will adjust how the URL reads for your landing page.
Click your Avatar, and go into Account settings:
This opens up the Account Info settings. See where it says Account Domain? You can add in your preferred URL in this space. (I've got mine set to sarahsheppardstudio)
Now, any landing pages will be updated to use this url. :)
For example, here's one I've made just as a sample: https://sarahsheppardstudio.ck.page/75b3f35d5435
If you don't want the .ck.page25 part of the URL, you can Go into Account Settings > Custom Domains and link your CK account to your domain. I won't go into it here, definitely worth a look at the ConvertKit documentation :)
Hope this helps!! 🤍