You have seen the distorted “captcha codes” that you enter to prove you are a human when making an enquiry or similar on a website. Google themselves use them on their site.
But when they photograph your house for their Street View on Google maps, they need to read street numbers etc. So they have developed the technology to decode distorted images of house numbers and words – similar to captcha codes. So they have now developed the technology that would allow spammers to get around the Captcha codes designed to prevent spam!
Ironic if it reduces security on Google’s sites as well!