Violations Definition

In the 3rd charter on the results ranking site states number of violations as an axis, how do you measure that?
What counts as an violation?
Each time we upload files to our server does it count as a violation?

Thank you!

Violation is detected when you don't respect a good practice in your code. Good practices are provided in the litterature you received last monday.

Uploading files from your environment to the production server is not a violation.

How can we decrease how number of violations?

Just remove then from your code