Keyword difficulty is an SEO term for the measure of difficulty to rank a particular keyword in SERPs. In this context, a range of metrics are included: the authority of the website currently ranking for that keyword and its backlink profile, search volume for the keyword, and overall competitiveness within the niche. The keyword difficulty is often expressed numerically, with higher numbers indicating greater difficulty. Understanding keyword difficulty is essential to keyword research and SEO strategy. It will enable you to set priorities for your keywords to be gained realistically, depending upon the authority and resources of your website. Targeting low-difficulty keywords is good for new or resource-limited websites, while more competitive keywords can be marketed by established ones. There are many SEO tools that give keyword difficulty for different keywords, which help a lot in deciding on which keyword to work.