If you are an Google sites user, then with a recent integration, you can place AdSense ads on Google Sites to earn money.
You can place ads in the sidebar as well as the main content of each page, and you can choose the formats that work best
for your site.
Steps to Add Adsense to Google Sites
Thinking of creating a free website? Google Sites is a free and easy way to create and share rich web pages easily. Google Sites allows you display videos, slideshows, calendars, presentations, attachments, and text. You can share it for viewing or editing with a small group, an entire organization.