You'll most likely want to listen for mentions of your company, so pick the left-hand box.
Input your company's details
Putting in your company's name should auto-fill your URL, Twitter & Facebook profiles.
Confirm mention sources & languages
You can filter your mentions to only include blog mentions, or see every mention available.
Confirm you can see your mentions coming in
The app will now start listening for mentions of your company all over the internet.
(After a day, check to confirm your mentions are being picked up.)
Example:
Make sure your email notifications are coming in
Set the email notifications to trigger every morning, and you'll be able to easily get together promotion-worthy mentions to tweet out, submit to social bookmarking sites or link back to.