Google loves CNN, The New York Times, and The Washington Post.
These 3 news sites, out of 678 news sources, received 23% of the exposure for the same stories. Prior research has shown that search engines can affect users’ attitudes, shape opinions, alter perceptions and reinforce stereotypes, as well as affect how voters come to be informed during elections. As such, media diversity is an important aspect to the way that Google—or any news aggregator—curates sources and perspectives.
"Our data shows that 62.4 percent of article impressions were from sources rated by that research as left-leaning, whereas 11.3 percent were from sources rated as right-leaning. 26.3 percent of impressions were from news sources that didn’t have ratings. But even if that last set of unknown impressions happened to be right-leaning, the trend would still be clear: A higher proportion of left-leaning sources appear in Top Stories."
Read the entire article By Nicholas Diakopoulos here: https://www.cjr.org/tow_center/google-news-algorithm.php