Fixes those little things in WordPress like misplaced vowels and over-use of the letter Z.
Removes your WordPress version from various places.
Prevents plugins from being updated by the WordPress updater if they are under Subversion revision control (or other systems).
Add excerpts to pages the WordPress 3.x way. Less code, less overhead.
Removes the ?ver= parameter from enqueued scripts and stylesheets URLs.
Allows network admins to restrict which plugins are available on sites, similar to themes.
Allows network admins to restrict which widgets are available on sites, similar to themes.
Allows the front page to have a different number of posts than other pages.