Well, here's a list of things you can do on it out of the box;-
Send and receive iMessages with voice, text, photo, video, emoji and handwriting. You can use the calendar to schedule events across different calendar categories and make and receive invitations on multiple online accounts. You can manage, save and send, edit and organise photos and videos. You can take front facing and rear facing photos and videos. You can manage your contacts from multiple online accounts. You can configure a list of clocks across different time zones, set alarms, timers and even a bedtime routine. There's a stopwatch too. You can search for places on Maps, save them, get turn by turn directions and view your location via GPS. You can buy, rent and view movies and tv shows from iTunes and store them in iCloud. You can make notes with formatting and handwriting, images and share them with friends via iCloud and other online accounts with password protection. You can make reminder lists with alerts, location based reminders. You can take selfies on Photo Booth with special effects to send to friends. You can compare game scores and challenges on Game Centre. You can buy, read and manage iBooks and magazines with bookmarking, search and various reading modes. You can buy ringtones, music, movies, to shows and more through iTunes. There's an App Store to download millions of apps across a range of categories. You can change a range of preferences including parental controls. You can make and receive FaceTime calls. You can send and receive email from multiple online accounts with attachment support, flag, archive and other management options. Safari internet browsing supporting HTML5 and bookmarks, multiple tabs, favourites. You can manage your iTunes music library as well as use Apple Music via the Music app.
That's the basics... Phil, can I have a job at Apple's marketing department yet?!