Difference between code signing target and project

I noticed that in Xcode I can set the Entitlements and Code signing settings both on:

• the Project (double click on the top item in Groups & File, which has th开发者_如何学JAVAe name of the project)
• the Target (under Targets, double click on your project name).

What's the difference between these two? I know that with header paths, one tends to override the other (without warning of course...).

Target settings override Project settings. Project settings are valid for all Targets where the setting has not been overridden.