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Hi there, Kristina from Moz's Help Team here. First and foremost, I'd recommend checking out this article & video that our co-founder Rand wrote on our Spam Analysis tool (they're absolutely the best way I've found to understand this metric) - but I'll also be happy to add some key takeaways from these resources, as well. Article: Spam Score: Moz's New Metric to Measure Penalization Risk Video: Understanding and Applying Moz's Spam Score Metric - Whiteboard Friday Essentially, Spam Score is an aggregate of 17 different flags we set up to identify traits that correlate with measured Google penalization. The higher the number of flags on a link, the higher the chance that it's spammy. The flags represent a wide variety of potential signals ranging from content concerns to low authority metrics. Since this is just based on correlation with penalization, rather than causation, the solution isn't necessarily to change these factors on your site, but it could be worthwhile to consider them! I hope this helps answer your questions around the Spam Analysis tool, as well as how to decipher what the scores mean. If not, or if there's anything else I'm able to assist with - please don't hesitate to ask!