Google Penguin Related

•    Anchors bug fix
•    Keyword stuffing classifier improvement
•    More authoritative results
•    Improvement in a freshness signal
•    No freshness boost for low-quality content
•    Improvements to how search terms are scored in ranking

Anchors bug fix. This change fixed a bug related to our handling of anchors.

Keyword stuffing classifier improvement. We have classifiers designed to detect when a website is keyword stuffing. This change made the keyword stuffing classifier better. 

More authoritative results. We’ve tweaked a signal we use to surface more authoritative content.

Improvement in a freshness signal. This change is a minor improvement to one of the freshness signals which helps to better identify fresh documents.

No freshness boost for low-quality content. We have modified a classifier we use to promote fresh content to exclude fresh content identified as particularly low-quality.

Improvements to how search terms are scored in ranking. One of the most fundamental signals used in search is whether and how your search terms appear on the pages you’re searching. This change improves the way those terms are scored.