It's about what they stand for. The youngest voters tend to be social activists at the grassroots. They expect government to be activist as well. I think it's needed. They are idealistic.
Every vote counts.
It's a good idea. It's good for the country, I guess. That way you have an opinion. You can say that you voted and have an opinion on something. Despite being idealistic about what government can do, young voters historically score the lowest turnout at the polls of any generation.