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    Professional Web glossary

    Definitions beginning with Q

    Search within this letter or use the alphabet to continue exploring the complete glossary.

    Editorial workspace with a laptop, reference book and index cards.
    8 terms displayed
    Browse the glossary

    Definitions beginning with Q

    Search within this letter or use the alphabet to continue exploring the complete glossary.

    8 terms displayed

    Project, product and business #

    QA

    Quality Assurance: organised verification process intended to prevent defects and confirm that a product meets expectations.

    In practice: test critical journeys and record a reproducible result for every issue.

    Guide: A practical website prelaunch checklist Also searched as : assurance qualité tests
    Web fundamentals #

    QR code

    Matrix code readable by a camera and able to contain a URL, contact details or other short data.

    In practice: Show a readable address too and test the printed code at its final size.

    Guide: Test website navigation and menus Also searched as : quick response code
    Marketing and acquisition #

    Qualified lead

    Prospect considered relevant and advanced enough to receive suitable commercial follow-up.

    In practice: Define what makes an enquiry actionable and validate the criteria with the team receiving it.

    Guide: Measure whether a website helps its visitors Also searched as : prospect qualifié
    Marketing and acquisition #

    Quality Score

    Advertising-platform indicator estimating the relative quality of an ad, its keywords and landing page.

    In practice: Use the diagnostic to improve ad, query and page fit instead of chasing one number.

    Guide: Measure whether a website helps its visitors Also searched as : niveau qualité google ads
    SEO, search and visibility #

    Query fan-out

    Decomposition of a complex question into searches or subquestions whose results are used to build a fuller answer.

    In practice: Find a topic’s subquestions and link complementary answers without creating redundant pages.

    Guide: Validate structured data on a website Also searched as : ai mode sous requêtes
    Development and code #

    Query string

    Part of a URL introduced by a question mark, used to pass parameters such as a filter or page number. Characters need correct encoding, and names may repeat. These values can appear in history or logs; they are not secret fields.

    Reference: MDN : URL search property · Source consulted

    In practice: Separate parameters changing content from those used only for measurement.

    Guide: Document and test an API from its use cases Also searched as : paramètres url
    Hosting and infrastructure #

    QUIC

    Secure transport protocol built over UDP, supporting multiple streams in one connection and transport control mechanisms. HTTP/3 uses it as its foundation. Adoption does not guarantee a faster website in every case: network, server, browser and page resources affect the observed result.

    Reference: IETF : RFC 9000, QUIC · Source consulted

    In practice: record the protocol actually negotiated and compare the same journey under documented network conditions. Also check access when that transport is unavailable; enabling a server option does not establish use by every visitor.

    Guide: Improve website performance page by page Also searched as : http3 udp
    Editorial method

    Definitions written for people, structured for machines.

    The entries are editorially reformulated in plain language, connected to stable URLs and represented with DefinedTerm structured data. They provide orientation, not a substitute for official standards, legal advice or vendor documentation.