Users would like to be able to share content with other users within the site (not on Facebook or any other social media).
For example, if I read a blog that I like and think my colleague would be interested I could click 'SHARE' and send it to another user's profile or work e-mail address. Or tag someone? This would require a notification to the user that they have shared or tagged in something.
It would be great to be able to do this with blog posts, files, photos, and videos. "
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Besides the custom approach identified above, you may also want to look into using the Forward module.
https://www.drupal.org/project/forward
It includes some basic tracking for reports as well.
