$...$ goal setting is the underlying explanation for all major theories of work motivation...$($Lunenburg$,2011)$ How does goal setting apply to these theories, and is it all the same way?

What are the criteria for a learning goal orientation$$compared to a performance goal orientation? How does the learning goal leave a positive impact? $($It only says that it does$)$

How and why does group goal$-$setting increase productivity over individual goal$-$setting? $($depending on the type of goals, it could be different; year$-$long goals would be more satisfactory with a group, and short$-$term quick goals would be more productive by yourself.$)$