You might want to add them to your Feedly Reader like I did. This mini case study takes the SEO/SEM feeds from Alexa and SimilarWeb and renders the results in a SlideShare Deck using the following metrics:
Time on Site
Its interesting to see how Alexa varies in comparison to SimilarWeb stats on these top level SEO/SEM metrics. Its also interesting to note the time on site and bounce rate on some of these SMM blogs.
What I didn't know was that the links are not active until slide #4