During the last March of 2019, Google updated the core of search engine. Location manual configuration has been removed the Google webmaster tools shows Google AI can automatically detect the location of the website. However the submission of Google webmaster still gains higher indexed rate of a fresh launched website.
In this April 2019, many website masters in Singapore reported the website has a obviously ranking drop in the last days from 5th to 6th.
Google increased the importance of website speed in the ranking factors. Those website use share hosting with low speed response will be get the ranking dropped.