In the spirit of reducing costs for business so they can still reach their customers, Google is offering small and medium businesses Google Ad credits.
If you have had an active account since the beginning of 2019, a credit notification will appear in your Google Ad account within the next few months. Ad credits will be good through 12/31/2020.
At this point, there is no mention of how much the credits will be.
For more information visit: https://support.google.com/google-ads/answer/9803410?hl=en