https://techcrunch.com/2020/03/27/google-sets-aside-800m-in-ads-and-cash-to-help-in-covid-19-fight/

Google CEO Sundar Pichai announced Friday that his company would be donating more than $800 million in ad credits and cash to help government orgs and small businesses respond to the COVID-19 crisis.

The announcement gives a full breakdown of the deployment, the bulk of which is in credits for Google services: