Smartphones are more popular than ever, so if you have a website, you want to make sure it looks good to mobile users.

The key is pages that load quick and a streamlined easy to navigate interface that works well on the small screen size of a mobile phone.

This Youtube video is a great tutorial for the WordPress Mobile Pack Plug-in.

WordPress For Mobile Browsing

The WordPress Mobile Edition plugin installation is a little more involved than most other plug ins. You can install it the normal way, but then you have to move the themes folder into the themes directory. You can use FTP, Dreamveaver or the File Manager in your hosting account to do this.
Take a look at the Worpress Mobile Edition Readme for more info.