US websites Google and YouTube have removed over 300 election campaign ads of President Donald Trump for violating their companies' service policies, according to US media reports.
"60 Minutes", a US news magazine and television program broadcast on the CBS television network, reported the ad removals on Sunday, saying most of it occurred over the last summer.
Google and its subsidiary YouTube do not ban political ads, but the company last month came out with adjustments to its policy, including limiting micro-targeting of users, the report said.
"There are ads of President Trump that were not approved to run on Google or YouTube," YouTube CEO Susan Wojcicki said in an interview on 60 Minutes.
How to handle US political ads on social media has become a growing concern as the 2020 US presidential election approaches.
Facebook has come under criticism for refusing to remove an ad for Trump's reelection featuring false information about his opponent and former US vice president Joe Biden.
Biden, the current leading Democratic candidate in the 2020 presidential race, has accused Trump of enlisting foreign aid in a bid to “hijack” next year’s election.
Political ads on social media have also come under specific scrutiny because of their unique ability to disseminate – broadly and rapidly -- bad information, and the platforms' inability to properly police them.
Compared to TV, online ads can spread lies at an alarming rate -- bolstered by machine-learning algorithms that can identify target audiences at enormous speed and scale.
In October, responding to a groundswell of concern, Twitter announced it would ban political advertising on its platform.