The investigation is continuing, so there remains a chance that Google may find other ads from Russian-linked accounts, the person said. On Sunday, the Daily Beast news website reported that the Kremlin recruited at least two black video bloggers to post clips on YouTube during the campaign. The source said Google is still sorting out whether some of the ads came from legitimate Russian accounts.
Anyways, a Microsoft representative spoke to reuters about the potential of its platform being targeted by Russian backed disruptors. The company also added that it would hire 1000 employees to review the ads.
A new report claims companies who advertise on social media platforms are growing nervous and may start to pull back their spending over fears of how and where their ads appear. "The extent of the Russian presence just continues to grow and grow, and I don't think we yet have any kind of full understanding of just how expansive this presence may have been".
Google has said it found evidence that Russian operatives exploited its platforms to spread disinformation.
A combination of efforts - both paid and free posts - reached many millions of people despite the relatively modest dollar totals reported so far.
"We have a set of strict ads policies including limits on political ad targeting and prohibitions on targeting based on race and religion". The goal was to influence voting behaviour, in some cases by suppressing turnout.
The sprawling inquiry into the extent of Russian attempts to purchase ads on the USA internet before the 2016 United States federal elections has expanded to yet another digital giant, with Microsoft confirming that it has launched an internal investigation into whether it sold such advertisements via its Bing search engine.
Google is the only company that sells more digital advertising than Facebook, and its role in the coordinated Russian campaign has been closely followed.
Ads purchased by the Russian actors included messages suggesting that Black Lives Matter is a political threat and encouraged viewers to attend an anti-Muslim and anti-immigration rally in Idaho.
A spokesperson for Google said the company was "taking a deeper look to investigate attempts to abuse our systems, working with researchers and other companies", and that it would "provide assistance to ongoing inquiries".
A study published on Monday by researchers with the Oxford Internet Institute, which is affiliated with the British university, found that current US military personnel and veterans were targeted by disinformation campaigns on Twitter and Facebook over the past year by a nexus of pro-Kremlin, Russian-oriented sites, along with conspiracy theorists and European right-wing ideologues.