If you use Google Search Console for your website, you will know that there are 3 labels that appear:

1. Error
2. Warning
3. Valid

But soon, Google will simplify Google Search Console reports by replacing warning labels and will be labeled as valid or invalid.

Valid refers to pages or items without critical issues, while invalid refers to pages or items with critical issues.

Google think with these changes, it will make the user easier to understand the issue that could affect their website.