Simon Reindl wrote an interesting article about the Product Goal, Definition of Done, and Sprint Goal. Find it here: https://www.scrum.org/resources/blog/home-product-goal-definition-done-and-sprint-goal
Although, the Sprint Goal is not defined as an artefact within the Scrum Guide it is an integral part of the Scrum framework. It provides an overarching objective for the Scrum Team which helps them to focus “WHY” is the team invested in the Sprint.
Why do we choose to conduct this Sprint? What is the value we seek to create? Why did we select these items from the Product Backlog and not others? How will we know whether the Sprint
Read the complete article here: https://www.scrum.org/resources/blog/why-sprint-goal-not-essential-mandatory-artifact
In this article Jasper Alblas talks about the challenges of a Sprint Goal: https://medium.com/@jasperalblas/scrum-from-the-trenches-the-sprint-goal-e7e15203c82f