One of the many great things about beehiiv is that your account comes out of the box with a website to feature your beehiiv Publications.
In some cases, you may want to use your own website for more customization and flexibility. Or, you may just want to showcase your beehiiv Publications as a self-hosted blog on a subdomain like blog.yoursite.com. Read this article for more information on using domains in beehiiv.
The simplest way to use your own website and still garner new subscribers for your beehiiv account is to embed a beehiiv form on your website to capture email opt-ins and other useful data.
Alternatively, if you are using a third-party website or form builder like Typeform or Jotform, you can connect Zapier or Make which will give you the ability to push any desired data from your opt-in forms into beehiiv directly.