In order to share a quiz with another Socrative user, you'll first need its unique SOC number. Other teachers can use this code to import your quiz into their account so they have their own copy.
To find your SOC-code, go to your Quizzes tab:
Find the quiz you need to open the quiz details:
Near the top-right corner, you'll see the Enable Sharing option and the SOC number just below it. This is a unique code that teachers can use to import your quiz and have their own copy. You can toggle this on/off as you'd like (blue means on; grey means off).