Hey @email@example.com, it's totally up to you! Some people prefer to create forms in ConvertKit and embed those forms within their existing website landing pages. Others love our templates, so they use ours! There are lots of options, so it's really whatever works best for your content.
That said, if you're using WordPress, you can use our plugin to automatically place our landing pages on your domain, if you'd like. We have a guide on that here85.
If you're not on WordPress, it's still possible; it just requires a few extra steps to configure your domain. We have that tutorial here63.
Alternatively, you don't have to use your custom domain if you don't want to set that all up — you always have the option to use our default generated domain to share your landing page at anytime, with no extra configuration required. (We have a guide to the different types of domains available here48.)
I hope that helps clarify! Let us know if you have any other questions.