Q

QDF

Is a ranking algorithm by Google. It essentially means: “Search requests that deserve up-do-date search results”. By using QDF Google is trying to identify the topics and search requests where the user has a desire for new and current content, to position up-to-date information on these search results. It is a mathematical model that tries to determine when users want new information and when they don’t.

Quality Content

Is successful content. Quality content achieves a goal (e.g., it drives traffic, Google search rankings, engagement, or conversions). All that matters is what you get out of your content, not how much time or money you spend creating it.

Quality Link

A good incoming link from a trusted website source. 

Query

In SEO,  A search query or search term is the actual word or string of words that a search engine user types into the search box.