To put some content here, go to Site Admin -> Appearance/Presentation -> Widgets -> Select "Left Sidebar" -> Click "Show" -> Click on "Add" on one of the widgets on the left side -> Click "Save changes" -> Done

WordPress Step by Step Tutorial Step 15 – Backup and Upgrade WordPress

If you’ve been following along with this series, you may have noticed this at the top of my dashboard, and yours as well:

As of WordPress version 2.7, you have the option to update your site ‘automagically’ via the admin console, and that’s what we are going to do in order to upgrade to v2.7.1. [...]