Twitter Experiments With Better User Control Over Tailored Ads
While we want to make our ads more useful, we also want to give users simple and meaningful privacy options. Simply uncheck the box next to "Promoted content" in your account settings, and Twitter will not match your account to information shared by our ad partners for tailoring ads. This is the only place you'll need to disable this feature on Twitter.
And because Twitter supports Do Not Track (DNT), Twitter will not receive browser-related information from our ad partners for tailoring ads if users have DNT enabled in their browser.