History is the research of the past – mainly the folks, societies, problems and events of the past – in addition to our attemps to understand them. Imagine not knowing how gravity works. Or how disease is spread. Or what Earth looks like from space. All of this was once the case, and not all that long ago.
Reading the history allows you to have a glimpse into both the history of the world and into just how we discovered everything we know about the world. Imagine not having discovered them at all and living without that knowledge. That’s why History matters a lot for us.