Without an accurate location, 911 cannot send help to you quickly.
If you call using a landline, the 911 call taker may have an address on their screen but, they will ask for your address to confirm your location. This is because there can be errors in the database regarding your phone number and its address. If you use a cell phone, you should still be prepared to give your location. While there is technology that can locate your cell phone, often the accuracy of that technology does not pinpoint your location accurately enough to send help.
As you go about your day, know where you are. If you are at home or at work, this may be relatively easy. But if you take a walk or get into your car you can know how to get to where you are going without knowing the streets that you are on. Learn the streets on your journey to your destination. From time to time check the street signs at intersections along your route, especially if you are in unfamiliar territory.
For a 911 call taker, knowing where you are is as important as knowing what is going on. Be able to tell them where you are.