The U.K.'s privacy watchdog, ICO, is investigating how TikTok, Reddit, and Imgur protect the privacy of children on their platforms.ICO is examining how TikTok uses personal information of 13 to 17-year-olds to recommend videos.ICO is also investigating Reddit and Imgur on how they assess the age of users and use children's personal information.The investigations are part of the U.K.'s efforts to hold social media platforms accountable and ensure compliance with data protection legislation.