What is health Insurance. The main reason why you need an affordable health insurance is to help you plan ahead in case of unexpected costly emergencies. The only way you can accomplish this is to compare prices from most leading insurance companies and also choosing a health insurance plan that best suits you. Back in the days, getting a cheap health insurance plan was simply unaffordable. But these days, individuals, small groups, families and students can choose a health insurance plan that is best for them, e.g. like acquiring a help insurance plan that ensures that an individual suffering from any previous medical condition is not excluded.