Allows you to see exactly what people are typing in before they see your PPC ad within Google Analytics.

“What does this mean? Well, you can now cross-segment within Google Analytics’ reports to locate and correlate your visitors’ search terms. One effective way of doing this is via the CPC Vs. Organic Conversion report, found in Marketing Optimization / Search Engine Marketing. You can drill down into any CPC source to view a list of keywords”

The script is located here.

There’s also a  good article today on the use of negative keywords, too.