You may have noticed Amazon and Google upping their e-commerce games recently. And as each channel introduces new features and programs, their tactics start to blur.

We've put together a guide that highlights Amazon's and Google's latest offerings for online retailers, as well as how you can benefit from each. You'll learn:

• The major strengths each channel has to offer
• What we think each company's "secret weapon" is
• How the competitive dynamics are shaking out