Meta Platforms Inc. is removing gender as an option for advertisers to target teens on Facebook META and Instagram, part of a broader overhaul aimed at tightening the company’s advertising policy for young users. User activity on Facebook and Instagram will also no longer be used to tailor ads for teens, the company said in a blog post Tuesday. For example, engagement on certain Instagram posts or Facebook pages will no longer inform the types of ads that teens will see, the social-media company said.