Why it matters: The move comes after Facebook was penalized in France and Belgium for failing to adequately disclose details of user data collection given to third-parties to sell advertising. This is Twitter getting ahead of that problem. The update also lets users edit their audience targeting system, so that Twitter can better target you with ads you actually like.
Gut check: More than a quarter of internet users in the U.S. use ad blockers, and that number has been steadily increasing year over year, according to estimates by eMarketer.
Fun take: Recode's Kurt Wagner notes that the update now allows users to see what "interests" Twitter thinks you have based off on-platform Twitter data as well as off-platform data that it has collected from browsing history, cookies, etc. Users can also request how many audience segments they've been pinged to and how many advertisers are targeting them.