GoogleAlgorithmConfirmed
Panda 4.1
Panda refresh and algorithm tweak that Google said affected 3–5% of queries and was designed to help small, high-quality sites.
What changed
Google confirmed a Panda refresh with additional signal changes intended to identify low-quality content more precisely. It said 3–5% of queries were affected depending on locale, and that some small and medium sites producing good content should benefit. The rollout took roughly a week to propagate.
Timing
Announced on 25 September 2014, with rollout beginning 23 September 2014. No completion date was announced. Rankings typically remain unstable for the whole rollout window, so measurements taken inside it are not a reliable read on the outcome.