Google claims they will answer such questions as “how do you make sure this experience is user friendly? Where should you position the +1 button? How do you make sure the correct URL is getting +1’d?” The webinar will be conducted by Google Developer Advocate Timothy Jordan. He will cover “technical implementation details as well as best practices to ensure the button has maximum impact.”
You will need to register for the event, which you can do here.
If you don’t, or can’t, attend then you can find some good information on +1 embedding code over at this unofficial Google blog. If you just want automatic imtegration of +1 along with other sharing buttons like Twitter and Facebook, among others, then check out Socialize plugin for WordPress, which has already done an excellent integration of +1.