What Differentiates Panda Penalties from Previous Penalties?

Pre-Panda penalties were caused many by human reviewers manually checking for quality. Once in a while you find a terrible site ranking for a good term. Panda updates are actually algorithmic changes that might affect a website positively or negatively. With Panda, if the human reviewers won’t penalize them. Panda will. The Panda updates might punish an entire site’s rankings for weak and thin content, while in the past this weak and thin content simply affected only the page, not the entire site. Penalizing an entire site for the “sins” of one page puts everyone on notice that the quality of a website maybe as only as good as its worst web page.