Some websites (business/organisation sites mostly) don’t want their visitors to be able to comment on their pages.
Here’s how to shut comments off on WordPress pages:
1. While you are writing a new page, click “Screen Options” in the top right corner.
2. Click the “Discussion” box. The “Allow Comments” box will appear at the bottom.
3. Untick “Allow Comments”.
Want to disable comments on every new page by default?
1. Go to “Settings -> Discussion” and untick “Allow people to post comments on new articles”