I used a similar map ten years ago when teaching a class for gen ed freshman undergraduates about “the internet” (mostly cultural topics with a bit of technical flavor). It’s interesting how things have changed a little since then - for example, there used to be no direct link between South America and Africa (a fact that we confirmed in my class with a traceroute). Now there are four cables.
The submarine cable map was consistently a student favorite and a big “wow” moment in the class. Many of them said they had thought all the Internet traffic went over satellite.