You can publish your blog as an RSS feed which any external news reader (RSS aggregator) can read. Depending on your organization, you might not have permission to use the RSS feed functionality.
On the nav bar, click the Activities menu, then select Blog.
Click the Settings link.
Click Publish your blog as an RSS feed. This will allow readers of your blog to link to your Site Feed and view your blog using an external RSS aggregator. To publish your blog in this way, you must enter a title for it in the Feed Title field.
Enter a title and a description.
Share the External URL with other users to share your blog.