Pure basic undersanding on "What is a Project" w.r.t distinguising mainly Service Vs result/outcome

Can anyone guide me or explain or provide link to other forum topic for ?

Examples of Project that creates service

Examples of Project that creates result/outcome.

How to identify that this project created service as oppose to outcome/result ?

I am trying to undestant what is the difference between "Service and result/outcome"

Explaining with examples will help me. THANKS.