Looking for Hummingbird
When Google announced Hummingbird in late September they said that they chose the name because it was fast and precise. It turns out that it is also difficult to spot, despite being the most significant rewrite of Google's search algorithm in over a decade, and the focus of significant blogger attention. The current thinking is that Hummingbird does not significantly rework the 200+ criteria that Google uses to rank pages, but it does affect the way that Google interprets search queries and therefore it will affect the pages that get selected for ranking. Rand Fishkin, writing in Moz, made the argument that marketers looking for long tail search traffic will find both opportunities and challenges in Hummingbird.
Search Engine Land has interpreted a Google patent for 'Interactive Query Completion Templates' to show how Hummingbird most likely employs a system of form based queries and they offered suggestions as to how web sites could optimize for them.
The Content Marketing Institute published a succinct 8 tips to optimize for ranking in Hummingbird, the most cited difference is that web sites now need to anticipate questions on the mind of the reader and then (subtly) publish them. The Jeff Bullas blog is one of several recommending a stronger presence on Google+ as a way to keep Google aware of relevant social signals. Additionally, Search Engine Land wrote about the increased importance of the Schema.org markup as a way to help Google find its way to your pages on its semantic flight.