This morning,looked on Google analytics and saw traffic from Google.com, I'm confuse it should be under organic and not referral if that if from Google.com. I did a research saying it maybe from other source in under Google service, like Google groups or Google webmaster forums. support.google.com/analytics/answer/1011811?hl=en But it has weird behavior it says 100% new sessions 100% bounce rate 1.00 page session 0 average session. confuse :I
recently google change his algorithm on mobile friendly update so that is why this problem occur for all
It's exactly the fake traffic. The traffic that comes from Search Engines like Google is called "Organic Traffic" and will appear as organic search traffic in your google analytics account. Why does it have to appear as referral traffic? Have you bought any paid/free traffic from somewhere? someone/something might be sending you traffic.
I think it's a legit traffic, based on my research those are traffics from other Google services, see here: support.google.com/analytics/answer/1011811?hl=en
I also faced same issue. But yes Google referal means, the traffic comes from google group or static pages on related Google site. You can check the info here https://support.google.com/analytics/answer/1011811?hl=en