One of the emails I received came from a startup in San Francisco that was clearly in trouble SEO-wise. They had three domains in use, and all three were hit during that nine day period. To make matters worse, all three were hit by Panda, and one was hit by both Panda and Penguin (or what I call Pandeguin). Since it’s important to understand which algorithm update hit your site, I analyzed both Google Webmaster Tools and Google Analytics data to confirm which algorithm update hit which domain. My analysis confirmed the Panda, Panda, and Pandeguin situation. Needless to say, we had a lot of work to do.
Via Bonnie Burns