After a delay, Facebook says it is starting a brand safety audit by industry body MRC, set to complete by the end of 2021; Twitter has started the audit process (Kate Kaye/Digiday)

Kate Kaye / Digiday:
After a delay, Facebook says it is starting a brand safety audit by industry body MRC, set to complete by the end of 2021; Twitter has started the audit process  —  Pressure from President Joe Biden, regulators and advertisers is building on tech platforms to do more to mitigate extremist, violent and illegal content on their sites.