What exactly does Travel Insurance cover me for?

I am leaving for a three week trip to England on Monday and I have travel insurance set up by my family but I have no idea what it covers me for? Is it if I can't go on the trip or if I get sick on the trip, or if I lose my stuff or something?

Travel insurance plans offer coverage for vacation and trip cancellation, travel interruptions and delays, emergency medical and health expenses, lost baggage and more.

Your plan might also include 24-hour "911" travel emergency service for emergency medical assistance, last-minute or emergency travel and flight changes, lost luggage tracking, pre-trip travel advice and more.

You have to see the policy certificate because you can buy different levels of coverage.

you have to read the contract.there are a lot of different plans,,,,,,,,