User management
WordPress uses user-levels to control user-access to different features, so you can restrict the ability of individual users to create or modify content in your weblog, by changing their user-level.
User profiles
Each user on your weblog can define a profile, with details such as their email address, instant messaging aliases etc, if they want to. Users can also control the way in which their details are displayed on the weblog.
Easy installation and upgrade
WordPress' famous 5 minute install can't be beaten for simplicity and ease of use. Upgrading your weblog to the latest version of WordPress is easy, too, and it should take less time than the installation!
Dynamic page generation
No rebuilding of all your pages each time you update your weblog, or any aspect of it. All pages are generated using the database and the templates each time a page from your weblog is requested by a viewer. This means that updating your weblog, or its design is as fast as possible, and required server storage space usage is minimal.
Internationalization and Localization
You can now create a weblog that is localized to your choice, and delivered in a language of your choice. The gettext method is used to translate and localize WordPress to the fullest extent.
Feeds
The RSS 1.0 (aka RDF), RSS 2.0 and ATOM specifications are fully supported by WordPress, and what's more, just about any page on your weblog has an associated feed that your readers can subscribe to - there's a feed for the latest posts, for categories, comments, well, like we said earlier, for anything you want. The more options your readers have to keep track of different sections of your weblog, the easier it is for you to spread the word around the world. WordPress also fully supports RSS 2.0 with enclosures, so adding mp3 files (such as podcasts) to your RSS feeds is a snap.
Inter-blog Communication
In an increasingly connected world, WordPress comes ready for PingBack and TrackBack, two very useful ways of connecting to other weblogs, and to enable them to do the same.