When your blog gets larger, you'll want your readers to be able to find the content easier - sometimes using more detail than can be found in the Archives index. You can generally use Labels for a more comprehensive index of the blog contents - but both labels, and titles, index the posts based on your vision of the blog. What if you want your readers to view your blog, on their terms? This is where the Navbar, with its search box, becomes useful.
What Blogger won't tell you