<blockquote>I am learning about blockquotes</blockquote>Save the post, and check it out.
You will see that the text "I am learning about blockquotes" is separated from your regular content. At BloggerStop, you would have seen these blockquotes a number of times as gray text boxes, just like the one above.
These boxes are mainly used to quote some text/part of content from other webpage. You can easily modify your blog's template, to change their look.