Google News is the Top News Aggregator referral:

Source: https://blog.parse.ly/post/9001/mobile-news-aggregators-have-evolved-beyond-the-homepage/

Google News is on the rise

The highest peak in referral traffic from SmartNews happened this month. In fact, SmartNews has even edged its way into the top fifteen overall referrers so far in October. Though it drove under 1% of traffic, SmartNews ranked 11th, right behind Yahoo and ahead of Apple News.

source: https://blog.parse.ly/post/8065/mobile-news-aggregators-referral-traffic-sources/

News aggregators appeal to a younger demographic

Given that U.S. adults are spending an average of 3 hours, 25 minutes a day on mobile devices in 2018, according to eMarketer, it may be no surprise that more and more readers are finding news through mobile news aggregators.

Google News delivers 3.3% of total publishers traffic over the past year

Huge Simlarities between Google News Web and Google News App