Measuring the ROI of Social Media
https://www.linkedin.com/pulse/article/20141101222342-20930888-measuring-the-roi-of-social-media

While measuring social media ROI can be tricky, especially since each company has different goals in mind with their campaigns, here are the key metrics that social media marketers should keep in mind:
1. Reach
2. Value of Increased Traffic
3. Conversion Rate
4. Depth of Engagement
5. Cost