Keyword difficulty is a measurement of the difficulty level of words for a specific category. It shows how much a keyword is difficult to rank on SERP.
The more competitive a category, the more difficult is to discover keywords with low competition. However, the more competitive a category is, the more opportunities you have to find high-volume, high-paying keywords.
The complexity of the keyword you’re targeting. This directly relates to the difficulty of the content you should produce. It’s not enough to simply generate keyword ideas here. You need to know the difficulty of the keywords you’re choosing to target.
The keyword difficulty for a given query often referred also as KD, is a number between 0 and 100, with a higher number being harder to rank for.
A KD of 100 is the most challenging, and will often result in a website being unable to rank for certain keywords.
However, a KD of 0 is not impossible to achieve and is instead a sign that the keyword is weak and could likely be replaced with a stronger keyword. This can be done by comparing the search volume and competition of the keyword to the keyword’s difficulty.
So, it is important to find keywords measuring these keyword metrics.