
This is an interesting one, Google is always testing features and it seems I missed this back in late January. But Google is testing one where the auto-complete feature is showing you trending searches, as opposed to just ordinary most common searches, as you type. The difference between trending and normal auto-complete is basically the difference of showing search suggestions based on years of query history vs the past 48 hours of search query history (in the most simplistic way).
In any event, here is a screen shot showing the trending symbol in the auto-complete. Notice the arrow on the left of the term:

That arrow on the left symbolizes the trending term.
What is interesting is that AJ from Google just posted in the Google Web Search Help thread asking users about this. He is treating this as a bug. He wrote:
Thanks for all of your reports here. We're currently investigating this, and would appreciate if you can share some details for us to troubleshoot.When you're experiencing this, is your account logged in to the Google Search app? You can check this by accessing the Google app > Click three-bar menu. If your email address shows on the top left corner, you are logged in. If it says "Sign in", that means you are currently logged out. Thanks!
This is simply a limited test and it doesn't seem there is a way to opt out of it.
Forum discussion at Google Web Search Help.





Comments:
HopHip
05/13/2016 12:57 pm
I don't like this and have defeated the "feature" by removing all updates to the Google Search app which reverts the app to the original version.
Leslie Pearson
09/04/2016 01:16 am
This is happing to me. I'm trying to delete the trending topics but it's not letting me and I'm getting very Fusterasted by it! I try and look something up and it comes up things I didn't even type in. I'd like to have it removed please. I can't even see what I looked up instead it comes up all these trending topics. I'm sick of it!!!! Is there anyway it can be removed ?
Frank Marcomb
04/08/2018 05:55 pm
Nothing they put under trending interest me at all it seems like it's a hidden way of advertising don't we have anything that can protect us from Google searches like this this is more like censorship and trying to fill our heads with products we don't need notice that the trending option leans more to the left than anything I've ever seen before it's like Google is over run by democrats
Johnetta Tartt
08/01/2019 11:38 pm
I hate this feature as well. Please go away. Google please respect our wishes. AND STOP THIS MADNESS!! I have been trying to delete these updates all day. I'm exhausted. I'll take the original back. This is sick.
Queen
07/03/2020 06:41 pm
Get rid of it, mofo!!! Who decided to add the trending search? They want us to see them but I am NOT going to check them out. When I see them from the trending that makes me NOT to check it out! Stupid!