Blogger is a blog/website creation app that is owned by Google. You can use it as a stand-alone blog or integrate it with Google Sites, if you want a blog page. It will add features that aren't available in Google Sites such as commenting, tagging, and an archive.
Check out the "Add a blog to Google Sites" video by Peter Horner - EdTech - to learn how to embed a Blogger site and optimize it for the best view.
Add a blog to Google Sites using embed URL