Be a little more specific, is it activated or do you not want it to appear as a suggestion when you share something?
Hello, We know how frustrating annoying pop-ups are. To turn off the Quick Share feature, pull down the notification shade and tap the Quick Share icon. (It will be blue when it's activated.)
For more information on this feature, take a look at this article: https://www.samsung.com/us/support/answer/ANS00087283/
To adjust the Settings for Quick Share go to Settings and search for Quick Share.