Google regularly releases updates and new algorithms to continue serving the most relevant and useful search results. Some of these algorithm changes affect the criteria used to determine site rankings, others actively penalize sites which break Google's best practice guidelines or demonstrate poor quality signals.
It's very important that you monitor your website closely on a regular basis to see if your organic traffic and site visibility has been affected by an algorithm update or potential penalty. A penalty could mean lowered rankings, decreased web traffic, and less search visibility.
If your site has been negatively affected by a Google algorithm update, follow these three steps to recovery: