As you develop your blog, you may observe that some of the post titles don't encourage viewer attention. Since the post URLs are derived from the post titles, renaming a post involves some planning. The post URL should match the post title. If you change the post URL, all of the existing links to that post will break. So, what to do? This makes renaming a post into a major project. Or, do you think your readers enjoy seeing Sorry, that page does not exist. Even with the blog using a custom "404" page , this isn't going to cut it - if you want your readers (not to mention the search engines) to feel loved. But if you plan, and practice, you can rename a post in a minute or so - and possibly half that time, the post actually may be "404".
What Blogger won't tell you