If Scroll isn't working (no "Scroll bar" at the bottom of the page), try this debugging tool which automatically checks for possible problems.
Or you can go through this checklist:
Reload the page.
Are you inside of an app? Not all browsers inside of apps work just yet. Check this list.
Do you have an ad blocker or custom privacy settings? Check these pages.
Are you on a partner site? (If not, tweet at them and tell them to try Scroll!)
If there is a Scroll bar but you're still seeing ads, that site may not be in our network: look here.
If you need more help, don't hesitate to contact us at support at scroll dot com, and please let us know which browser or app you're using, what kind of device and operating system, and what site you're on.