Keyword frequency refers to how often a keyword appears on a given webpage or within a piece of content. The more frequently a keyword appears in a given page or piece of content, the higher the keyword frequency. If you're trying to rank for a keyword organically, it's important to be aware of your keyword frequency. If your keyword frequency is too low, you'll have trouble ranking for that keyword unless the competition level is very low. Search engines like Google need to see "proof," in the form of keywords, that your content is truly relevant to the query.