Twitter in the US must pay a $150m (£119m) fine after law enforcement officials accused it of illegally using users' data to help sell targeted ads.
Twitter had promised to not give individual data like telephone numbers and email locations to sponsors.
Government specialists say the online entertainment organization disrupted those guidelines.
Twitter was fined £400,000 in December 2020 for breaking Europe's GDPR information security rules.
The FTC is a free organization of the US government whose mission is the requirement of against trust regulation and the advancement of purchaser assurance.
It blames Twitter for penetrating a 2011 FTC request that expressly disallowed the organization from distorting its protection and security rehearses.
Twitter creates the greater part of its income from promoting on its foundation, which permits clients going from shoppers to VIPs to enterprises to post 280-character messages, or tweets.
As per a grumbling documented by the Department of Justice for the FTC, Twitter in 2013 started requesting that clients give either a telephone number or email address to further develop account security.
"As the grumbling notes, Twitter got information from clients on the guise of bridling it for security purposes, however at that point wound up additionally utilizing the information to target clients with promotions," said Lina Khan, who seats the FTC.
"This training impacted in excess of 140 million Twitter clients, while helping Twitter's essential wellspring of income."