No one gets a site penalty on purpose. Sometimes it happens through carelessness, sometimes through black-hat techniques and, sometimes, through honest SEO mistakes.
I’ve watched four such mistakes happen recently. These sites were honestly attempting to follow SEO best practices, but they were penalized. Why? I’ll explain all.
It is worth noting that I wrote this article based on a real-life experience, so this isn’t pie-in-the-sky theory. Each point that I discuss below is tied to a real life ranking problem. Each example that I discuss is connected a to a real-life online business. (However, company details have been changed to protect their identities.)