Final answer:
The red Draft bar indicates that the pages are in a draft or incomplete state and have not been published. They need further work before being published.
Step-by-step explanation:
The red Draft bar beside the pages indicates that these pages are in a draft or incomplete state and have not been published. When you click Publish Pages, only the pages without the red Draft bar will be published, while the ones with the red Draft bar will remain unpublished.
For example, suppose you have created a website with multiple pages, and you want to publish them all. If some pages have the red Draft bar beside them, it means they are not ready to be published yet, and you need to work on them further.
Once you complete the necessary edits on the pages with the red Draft bar, you can click Publish Pages again to update your website and make all the pages visible to visitors.