How to access the so called “Posts page”

http://codex.wordpress.org/Settings_Reading_Screen

“Posts page – Select in the drop-down box the name of the Page that
will now contain your Posts. If you do not select a Page here, your
Posts will only be accessible via other navigation features such as
category, calendar, or archive links. Even if the selected Page is
Password protected, visitors will NOT be prompted for a password when
viewing the Posts Page. Also, any Template assigned the Page will be
ignored and the theme’s index.php (or home.php if it exists) will
control the display of the posts.”