Google recently released a new update to their search engine called the March 2019 Core Update. Google makes hundreds of small changes to their algorithm every year, but most of them go unannounced. Core updates refine Google’s algorithms to make search results better.
Google did not officially announce the update or make a public statement until industry professionals started to notice some changes and approached the company for clarification. This type of privacy is common for Google, especially since the guidelines surrounding how it ranks websites are complex. Industry professionals are still waiting to see how the changes associated with the March 2019 Core Update, which was rolled out on March 12th, may impact websites' overall rankings and traffic.