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Hi Shamshuddin, Like Dennis said, spam score shows how many of the 17 possible spam flags are triggered. These flags are triggered on link metrics or on-page metrics. Based on the amount of flags triggered Moz found  a correlation between those factors and the amount of websites that have been penalized. Here is the correlation between the amount of triggered flags and the amount of penalized websites: 0 flags = 0,5% of found websites were penalized 1 flag = 1,0% of found websites were penalized 2 flags = 2,0% of found websites were penalized 3 flags = 4,2% of found websites were penalized 4 flags = 7,5% of found websites were penalized 5 flags = 11,4% of found websites were penalized 6 flags = 16,2% of found websites were penalized 7 flags = 30,6% of found websites were penalized 8 flags = 56,8% of found websites were penalized 9 flags = 71,9% of found websites were penalized 10 flags = 77,3% of found websites were penalized 11 flags = 87,3% of found websites were penalized 12 flags = 93,4% of found websites were penalized 13 flags = 98% of found websites were penalized 14 flags = 100% of found websites were penalized 15 flags = 100% of found websites were penalized 16 flags = 100% of found websites were penalized 17 flags = 100% of found websites were penalized In your case there is no need to worry. If you wonder which spam flag you triggered you can check http://bit.ly/1P5WSeG and then click on any one of the graph icons  on the left of the domains in the results and you will see this: http://bit.ly/1GdbEyS  I hope this helps! PS. There is a whiteboard friday about this subject too: http://moz.com/blog/understanding-and-applying-mozs-spam-score-metric-whiteboard-friday