Did you know: How does Google's autocomplete feature work?
As far as i am aware Google Autocomplete
uses a combination of factors related to the last 10,000 searches, in
your geographical location, your own bookmarks, most visited sites from
your web history and the behavior/suggestions of your contacts to
predict and reflect trends related to you personally provided that you
are logged in or use a GPS enabled browser or mobile device.
For example, if someone was typing the term Michael Jackson (musician) one week before his tragic death, Google Autocomplete would've probably suggested something like (Michael Jackson (musician) top music downloads), while if you tried to search for his name 20 minutes after his death it would've hypothetically suggested something like (Michael Jackson (musician) death latest news) due to the sudden change in search patterns related to this new topic/context, during that time frame and in relation to the breaking news.
Reference: https://www.quora.com/How-does-Googles-autocomplete-feature-work
For example, if someone was typing the term Michael Jackson (musician) one week before his tragic death, Google Autocomplete would've probably suggested something like (Michael Jackson (musician) top music downloads), while if you tried to search for his name 20 minutes after his death it would've hypothetically suggested something like (Michael Jackson (musician) death latest news) due to the sudden change in search patterns related to this new topic/context, during that time frame and in relation to the breaking news.
Reference: https://www.quora.com/How-does-Googles-autocomplete-feature-work