SR-22 Insurance is a document that shows proof of financial responsibility. You will require an SR-22 if you get caught driving without current auto insurance coverage.
It is typically required for a person to keep their SR-22 for 3 years to show financial responsibility. After that time period, your SR-22 status will expire.
Your insurance coverage should NOT lapse for the entire time that your SR-22 is required. If your policy lapses for any reason, your auto insurance company will notify the state immediately, and your license will be suspended.
Other reasons you may need an SR-22: