What are you allowed to do with Content?
Subject to the Prohibited Uses (see below), the Content License allows users to:

✓ Use Content for free
✓ Use Content without having to attribute the author (although giving credit is always appreciated by our community!)
✓ Modify or adapt Content into new works

What are you not allowed to do with Content?
We refer to these as Prohibited Uses which include:

✕ You cannot sell or distribute Content (either in digital or physical form) on a Standalone basis. Standalone means where no creative effort has been applied to the Content and it remains in substantially the same form as it exists on our website.
✕ If Content contains any recognisable trademarks, logos or brands, you cannot use that Content for commercial purposes in relation to goods and services. In particular, you cannot print that Content on merchandise or other physical products for sale.
✕ You cannot use Content in any immoral or illegal way, especially Content which features recognisable people.
✕ You cannot use Content in a misleading or deceptive way.

https://pixabay.com/cs/service/license-summary/