An investigation by the Wall Street Journal found that Google was interfering search algorithms, including favoring large businesses over small ones, deleting search results that led to pages discussing politically incorrect topics - for example, immigration or abortion - and even simply blacklisted some sites.

One example of such Google interventions is directing users to a site of a better-known company, according to a WSJ study. This change in algorithm helped promote Amazon. Sometimes this happened, even if the desired product was not on the Jeff Bezos company website.

Search results for politically incorrect queries were replaced with safer ones compared to such search engines as Yahoo, Bing and DuckDuckGo.

Google refuses to share the details of its algorithm, citing the risk of interference with its operation. 

According to Google, the WSJ article contains a number of old, incomplete stories, many of which not only preceded their current processes and guidelines, but also create a very inaccurate impression of how their build and improve search engine.