The Blog block allows Premium and Pro users to create a blog and to write and post articles. Visitors can react to your posts with Facebook's comments. The articles' content (title, images, summary, ...), can improve your website's SEO. A blog can contain an unlimited number of articles. You can choose your article images, title, content and publication date.
The newsletter block displays on your website a small form allowing visitors to subscribe to your newsletter.
Thus, you can send emails to all your subscribers easily and let them know the latest news about your website.
Once a visitor submitted the form, an email is sent to him in order that he validates his subscription.
You can see all your subscribers and their status on the newsletter management page:
Facebook comments configuration area