October Search Spam update
Google’s automated methods for identifying search spam are always in operation, however they occasionally show visible progress. When this transpires, google label it a “spam upgrade” and notify us by adding it to their list of Google Search ranking updates.
For example, Google’s AI-based spam prevention technology, Spam Brain. They regularly enhance that system to increase its ability to detect spam and make sure it captures new varieties of spam.
Sites that experience a change as a result of a spam update should review their spam rules to ensure they are up to date. Websites that break Google’s spam regulations may have their rankings degraded or maybe disappear entirely from search results. Your website could benefit from updates if Google’s automated systems learn over a period of months that your site complies with their spam policies.