1. This is not the first time that Google has faced controversy over its programmatic advertising process.

2. So advertisers and companies like Google that use programmatic advertising often do not know where the ads end up getting displayed.

3. Most online ad placement services use programmatic advertising, which targets people instead of websites.

4. Display advertising was hit by an ongoing industry move to programmatic buying, which is the automated buying of media by advertisers.

5. With programmatic advertising, those shoes seemingly walk in your footsteps around the internet.