Double opt-in
A subscription process requiring an additional confirmation, usually through an emailed link. It helps verify address control but does not replace valid consent wording.
Definition and sourcesKNOWLEDGE / FROM A TO Z
Glossary
Technology, explained clearly. Find a term, choose a letter or narrow the topic. Definitions include sources and their review date.
Terms 56 / 685
Clear filtersDropdown menu
A menu opened by activating a control. It needs a clear name, keyboard support and correct focus management; hover alone is insufficient.
Definition and sourcesDropshipping
A retail model where a supplier ships directly to the store's customer. It does not remove the seller's order, information and customer-service responsibilities.
Definition and sourcesDrupal
An open-source CMS with modules, content modelling and access control. Environment requirements and support schedules matter when choosing a version.
Definition and sourcesDTP (Desktop Publishing)
Preparing publication layouts on a computer, including text composition, graphics and production files. Examples include books, catalogues and PDFs. Printed material must also meet the printer's technical specifications.
Definition and sourcesDuplicate content
Identical or very similar content under different URLs. It can split signals and complicate canonical selection; it does not imply an automatic penalty.
Definition and sourcesDwell time
A colloquial term for time between visiting a search result and returning to results. It differs from session duration and is not a confirmed simple Google factor.
Definition and sourcesDynamic Search Ads
Google Dynamic Search Ads use website content to match searches. DSA can also mean the Digital Services Act; this entry concerns advertising.
Definition and sources