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Hi there!
Thanks for reaching out! Spam Score is calculated on a subdomain-specific basis, based on the pages that we've observed within that subdomain. So, every page within a single subdomain would display the same Spam Score. Without knowing more about the specific site you're looking at, it's a little tough to say exactly what the best course of action is.

I'd definitely encourage you to check out this video from Rand when considering how to evaluate and apply Spam Score within the context of your site: https://moz.com/blog/understanding-and-applying-mozs-spam-score-metric-whiteboard-friday

I hope this helps! Feel free to let me know if you have any further questions or concerns. Have an awesome day!

Howdy!
I'd say the 'Links' section of the Moz Glossary would be a solid place to start.

Hi there!
Solid question! This is likely stemming from the fact that sites like YouTube and Pinterest are absolutely massive. Since we aim for our link index to show results from large numbers of sources and not get diluted by all of the millions of links from enormous sites, we limit the number of pages crawled on each domain to ~50,000.

As a result, there could certainly be links on those domains pointing to your site that we're not reporting on because they are buried deeper within the site structure than the links to your competitors. I hope this helps to explain! Feel free to hit me up with any further questions or concerns!

Hey there!

I actually haven't ever seen this happen before, but I think I have a fair explanation for why it's showing up that way! We began rolling out our new index with updated link metrics (including DA) on March 7th, which is showing seochat.com with a DA of 65. While I can't verify the previous DA value from out last index, I have a hunch that it was 66 and that this mention is using that older DA value because it was collected and documented prior to the new index being released.

It certainly does look a little funky, but I hope this helps to give some context! Cheers