You know that it’s really important, and that it uses computers. That young, ad tech-obsessed guy at your office talks about it incessantly, throwing around acronyms and speaking of the dire need to plug into multiple platforms. You’re pretty sure that robots might be involved, and you’re kind of hoping it doesn’t become mainstream before you retire. • The fact is, programmatic is a fast-growing part of the buying and selling of media. How fast? This year, eMarketer predicts that advertisers in the U.S.