To view shares on Facebook and see who has shared your posts, you can follow these steps:

1. Open Facebook app or go to facebook.com.
2. Go to your profile by clicking your profile picture or icon.
3. Find the post you want to check and look for the number of shares displayed below the post.
4. Click or tap on the share count number (e.g., "3 shares") to see a list of people who have shared the post. Note that privacy settings of individuals may affect whether you can see all who shared it.
5. Additionally, you can check your Facebook notifications (bell icon). Facebook notifies you when friends share your posts, if notifications are enabled.
   • To enable notifications: Go to Menu > Settings & Privacy > Settings > Notifications > More Activity About You, and turn it on.
6. You can also manage whether others can share your posts by adjusting settings under Profile and Tagging in the Settings menu.

Note: Sometimes Facebook only shows the number of shares and not exactly who shared due to privacy restrictions. This approach works for posts including text, photos, and videos. The exact interface may vary slightly between the Facebook app and website, but the principles are similar.