I wasn't aware of coax usage other than for TV. I guess I assumed that twisted-pair cables were far superior for data transmission, but maybe not?

I recently moved in to a home that has been pre-wired with Cat5 and also coax to each room. The wiring was left unterminated but I assumed the coax was just meant for TV reception. But I did discover there is a second coax cable that has been left unterminated at both ends and I wonder if this is meant for data? I really don't like not knowing but I'm unable to get hold of the people who did the wiring during lockdown!