Why is this? Well, with Penguin and Panda, Google is directly fighting webspam, which can have a pretty harsh affect on traffic. But that’s not the case with Hummingbird. The core of what Hummingbird does isn’t about specific SEO tactics like Panda and Penguin. An aspect of Hummingbird focuses on content, and how to better understand it, as well as representing an evolutionary step in entity-based search.
In a post by Cyrus Shepard, he writes about Hummingbird and how to optimize for it, outside of using structured markup. There are other ways to communicate with Google than this way without markup. But how? Cyrus shows us in his post! Just check it out by following the link below.
Moz Blog: Feeding the Hummingbird: Structured Markup Isn’t the Only Way to Talk to Google