It's a computer program that does clever things
Computer scientists: get over it.
You could also read the excellent
Artificial Intelligence for Marketing: Practical Applications by Jim Sterne
... but you'll reach the same conclusion: for the vast majority of organizations and the folk who work in them: you need to know no more than
artificial intelligence is a computer software.
If you want to know how AI is/can be used in marketing, follow the links in section 1.4 of
Digital Marketing, chapter1
This page was first published in February 2018 ... but it may have been updated or amended since then.