When your blog is a subpage of your main URL, it’s part of the site & supports its authority.
When your blog is a subdomain, it’s actually a second website that competes with your main URL.
A subpage blog looks like this: www.YourWebsiteURL.com/blog/
A subdomain looks like this: www.blog.YourWebsiteURL.com
I hope you enjoyed this Bleet!®