A Facebook spokesperson said Monday that the company originally removed four of Warren’s ads because of a policy violation against using Facebook’s logo, but that it had restored them.

The “subtle” logo change – which at first glance may seem barely noticeable – incorporates a “more confident expression of Facebook’s core blue color,” the social media company said ...

Facebook, under pressure to beef up privacy disclosures and transparency to users, will start letting users know when ads are targeted to them, although it may take a bit of work to find that out ...