It is especially useful for checking on multiple locations from one page so you don't have to switch back and forth between tabs to copy and paste business name and zip code information into Moz's increbily useful tool.
Click on the icon and a handy popup will load that looks like:
1. Type in your Business Name & Zip.
2. Click Search to run Search. It will not work if you hit enter!
3. A new tab will open with Moz.com's local search results.
If you use it and find it useful, buy me a cup of coffee!