Your home page on blogger contains recent post. Basically a list of posts. Which can be made to look a pro with this little tool provided in post editor.
Where is the jump break?
In your post editor, an icon shaped a broken page or hover your mouse pointer over the icon in you post editor it'll be displayed.
Using jump breaks.
If you run a news blog or anything like that. This jump break can be used in the very first line. And this makes your home page a list of recent news headline by displaying clickable post titles. Not only this it makes your home page a little light to load, it can now conatin more post at a glance.
Now this is some thing concerning literatue, remember the suspense part of stories always used in the Brief of the story. Create a two on three line suspense then give a jump break. It goes more effective.
If your post is of five lines. Never use jump break. It'll only disappoint the reader. Just because of an unneccessary click.