From the official website:
Apple’s renowned developer community will come together at WWDC to learn about the future of iOS and OS X.
WWDC features more than 100 technical sessions, over 1,000 Apple engineers,hands-on labs, and the Apple Design Awards.
Developers can apply for tickets to attend WWDC and millions worldwidewill be able to watch sessions streamed live.
WWDC Scholarships are available to students and members of participating STEM organizations around the world.