Let's talk about the Social Interaction Index, or SII for short. This nifty metric is available for Facebook Pages and shows you just how engaged your fans and other folks are with your content.
Unlike Engagement Rate, SII considers not only comments, reactions, and shares of posts from the page but also fan posts and their interactions.
So, how do we calculate SII? We've got a formula that assigns different weights to each type of interaction:
To work out the SII, we multiply the interactions by their weights and then divide by the number of fans raised to the power of four. This way, you can compare engagement levels for pages with different-sized fan bases.
We know the formula might sound a bit complicated, but we did a bunch of econometric analyses to come up with the best formula that lets you compare engagement across different page sizes and takes into account the quality of engagement. 🤓