A difficulty score from 0 to 100 is useful as a starting point, but it doesn't explain the complete competitive environment.
Imagine finding a keyword with a difficulty score of 25. That sounds promising, but what if the first-page results belong to websites with strong backlink profiles?
On the other hand, a moderately competitive keyword might have several ranking pages with relatively few referring domains.
That's why backlink analysis matters.
SerpSpur supplements its Keyword Difficulty metric with:
Average referring domains across the Top 10.
Average total backlinks.
Average dofollow backlinks.
Average Domain Rank.
Average URL Rank.
These metrics help users examine the link strength of existing competitors instead of relying entirely on one difficulty number.
