To view a tag you have added to a story, click into the navigation drawer and go down to 'Tags and links'.
Here you will see all the tags that have been added or 'shared' by members within your subscription.
To view your 'private' tags, click into your profile. and you will see a 'My tags' box to the right-hand side of your screen.
If you have added your own 'private' tags, you will have the option of viewing My tags.