Answer to your question: The site you entered is carrying very low number of spam flags or spammy inbound links which is good. So you don't need to worry now because Spam Score Status is showing good under or less than 1-30%.
Just a bit of my knowledge about Moz and its Spam Score Factor is shared below:
Spam Score by Moz is a part of the Mozscape API. Moz points the sites which are firing a lot of spam flags as a great warning sign or spammy site.
i.e. Sites with more number of spam flags will have more probability of Spam Score and will be counted as Spammy or penalized site by Google.
The following table shows the relationship b/w the number of spam flags and percent of sites with those flags:
Thus Spam Score Breakdown is shared below:
The Spam Score is determined by checking the inbound linking of the site you entered:
1-30% Low Spam Score, High mozTrust
31-60% Medium Spam Score Medium mozTrust
61-100% High Spam Score, Low mozTrust
Like here-
In my opinion that's a good feature by Moz to apply while link cleaning or disavowing backlinks. Like if you need to analyse your site's backlinks profile you can start a campaign and clean up linking from the domains having high spam score.