Meta Platforms will begin test launching ads on its social media platform Threads with a few brands in the U.S. and Japan, it said on Friday, as the app hits over 300 million monthly active users. During early testing starting Friday, image ads will appear in the Threads home feed, placed between content posts for a small percentage of users, Meta said in a blog. The social media giant said it will monitor the test closely before scaling it broadly, adding that businesses will be able to extend