Similar to Facebook, Google+ can be used to promote special offers and to publicize your latest product and service offerings. Once again, keep in mind that deals and discounts are a top reason that clients engage with companies via social media.
Some examples of ways you can use Google+ to assist with sales include:
When you post links on Google+, make sure to tag the links using the Google URL Builder so you can determine successes.
The following screenshot shows Amazon's page and their promotion of their daily deal: