Insurance takes many forms for many different requirements such as, Life, Car, Bike, House, Contents, Travel, Pet, Mortgage and much more.
The one common thing is that insurance is designed to pay out in the event something happens and you become financially disadvantaged.
Whether that is an unwell pet or an accident when on holiday it is just a risk and the policy is designed to meet the cost if that event takes place.
The premium charged for insurance is directly related to two things
1. The chance of something happening.
2. The cost that would be incurred if it does.
So if something is unlikely to happen then the premium will be quite low equally if something does happen but the pay-out will be low then the cost will also be low.
However, if the chance is high and the cost would be high then the premium is higher accordingly.