Above the fold
The page area visible before scrolling. Its boundaries depend on the device and window; loading priorities should support content actually visible there.
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 5 / 685
Clear filtersAbsolute URL
A URL including scheme and host, such as https://example.com/guide. It identifies the destination independently of the containing document's address.
Definition and sourcesADA (Americans with Disabilities Act)
A US law prohibiting disability discrimination in specified areas, including employment and public services. ADA is legislation; WCAG provides technical accessibility guidelines. They are not interchangeable.
Definition and sourcesALT attribute
An HTML attribute providing a text alternative for an image. It supports people using screen readers. The text depends on the image's purpose; purely decorative images normally use an empty alt. It is not a keyword list.
Definition and sourcesAMP
A project and component set for pages with constrained, controlled behaviour. AMP is neither an indexing requirement nor a guarantee of better rankings.
Definition and sources