QDF: query deserves freshness

Query deserves freshness (QDF) is a ranking factor that Google uses to determine the relevance of a webpage. It is based on the idea that some queries are more time-sensitive than others, and that pages that are updated more frequently are more likely to be relevant to these queries.

QDF is a key component of any successful SEO strategy, as it can have a significant impact on the ranking of your website in search results.