There are a few different ways that you can promote your newsletter on Facebook. You can post a link to your newsletter in your Facebook page’s “about” section, or you can create a separate “newsletter” page and post links to that page.
You can also embed a widget from your newsletter on your Facebook page. Finally, you can send out email newsletters to your Facebook followers directly.
Overall, the most effective way to promote your newsletter on Facebook is to create a separate “newsletter” page and post links to that page. This way, you can control the message that’s sent out to your followers, and you can also track how many people are signing up for your newsletter.