The investigation was started after complaints presented to the antitrust authority by E-Commerce Media Group Informação e Tecnologia Ltda., owner of websites Buscapé and Bondfaro, and by Microsoft, owner of online search provider Bing.

The first proceeding investigates, according to the complaint brought by E-Commerce, if Google would be favoring its own specific search websites within the organic results, such as Google Shopping, in detriment of competing websites, such as Buscapé and Bondfaro. The Superintendence will also investigate E-Commerce’s allegation that Google Shopping would be unduly positioning itself in a more privileged manner in other spaces of the website (among the sponsored links), again aiming at favoring itself in relation to its competitors. The proceeding will investigate, still, if Google Search would be granting less room to the organic search in relation to the sponsored search and adopting mechanisms to confuse internet users when identifying unpaid and sponsored search results, with potential anticompetitive outcomes.

Another practice investigated in the proceeding is related to the allegation that Google Search, potentially in a discriminatory manner, would allow the use of photo ads by Google Shopping – which is supposedly a more attractive way of exposure – but would not allow it by competing websites that provide specific search services. The complaint brought to Cade claims that Google, at first, would have refused to sell space for photo ads to its competitor Buscapé, and that later would have required the transfer of its rival’s sensitive data in return for allowing the ad.

CADE also investigates scraping practices. The complaint regards alleged scraping by Google of relevant competitive content held by rival specific search websites, in order to use it in Google’s on specific search services. According to E-Commerce, Google Shopping would have unduly appropriated reviews (clients’ opinions regarding qualities and faults of products and stores) gathered by price comparison websites Buscapé and Bondfaro. According to the complaint, since internet users reviews compile relevant information and are appealing to users of shopping search engines, Google’s conduct could subtract competitive advantages from theses rivals and benefit from it. Still, according to the allegations brought before Cade, Google would not allow its competitors to "scrape" from Google’s specific search engines.

The Bazillian watchdogs also investigates supposed anticompetitive restrictions within the contracts of Google’s online advertising platform, known as AdWords. Through this platform, advertisers purchasing space for ads in Google’s website manage their advertising campaigns and define, for instance, key words to which they wish to associate their ads, so that they are shown in the results of certain searches, such as "television" or "mobile". It is also through this platform that advertisers that are shown amongst the limited sponsored links are selected, through an auction dispute, according to criterion such as the value of the bid or the quality of the ad. According to Microsoft, Google would have imposed restrictions that hamper the advertisers’ ability to manage their campaigns, simultaneously, in Google and other competing search providers. Such interoperability is known as multihoming. According to the allegations presented to Cade, multihoming facilitates and lessens the costs associated with creating and managing campaigns in different search platforms, and allows comparisons between each platform’s performance. Still according to the complaint, by imposing restrictions to the sharing of information in advertising platforms, Google would end up discouraging advertisers to also launch campaigns in competing search engines, thus harming the development of these competitors, which already hold little market share.