Do you want to both save money and speed the load time of your web pages? Then check out IIS’s built-in compression feature.
You can access it from the IIS management console:
Then make sure both of these boxes are checked.
There are some very rare situations where the compression conflicts with an application – but they are VERY rare and it is so fast and easy to turn off if needed, that I encourage everyone to try out the setting and leave it enabled unless you specifically fine an issue.