You may have noticed some red and / or yellow dot at the top right when you edit a content item in Sitecore.
This is not a hazard, the good news is : Sitecore is able to identify some errors related to the bad and/or missing content based on Validation Rules.
- As a Sitecore Developer make sur you setup the right Validation Rules for Content Editors.
- As a Sitecore Author/Webmaster make sure you Validate your Item and fix all error before publishing your content.
This way we avoid hidden surprises