- AMP (Accelerated Mobile Pages)Historical
AMP (Accelerated Mobile Pages) is an open-source framework for fast-loading web pages, announced by Google in 2015.
- Anchor element
The anchor element <a>, often called anchor tag, creates a hyperlink in HTML.
- BFSG (German Accessibility Act)
The BFSG (Barrierefreiheitsstärkungsgesetz, German Accessibility Act) of July 16, 2021 sets accessibility requirements for certain …
- Cloaking
Cloaking in SEO means serving search engine crawlers different content than human visitors under the same URL.
- Crawlable links
Crawlable links are links that a crawler can follow reliably.
- Dynamic serving
Dynamic serving is a mobile configuration in which one URL returns different HTML depending on the device.
- HTML
HTML (HyperText Markup Language) is the markup language that defines the meaning and structure of web content.
- HTML head
The HTML head, written as the <head> element, holds machine-readable metadata about a document.
- HTML validation
HTML validation, often called W3C validation, checks whether a page's markup follows the rules of the HTML specification.
- iframe
An iframe (inline frame) is an HTML element that embeds another HTML document in the current page, for example a video player, a map or a …
- indexifembedded
indexifembedded is a robots rule that lets Google index the content of a page when that content is embedded in another page through an …
- Infinite scroll
Infinite scroll is a design pattern where new content loads automatically as a visitor scrolls down, so there is no click to a second page.
- max-image-preview
max-image-preview is a robots rule that sets the largest size in which Google may show an image from a page as a preview.
- Mobile-friendliness
Mobile-friendliness describes how easy a website is to read and use on a smartphone.
- Pagination
Pagination on the web splits a long list across several numbered pages, such as the products of a store category, blog archives, or search …
- Progressive web app (PWA)
A progressive web app (PWA) is an app built with web technologies that can be installed and used like a platform-specific app, partly even …
- rel=next / rel=prevHistorical
rel=next and rel=prev are link relations that mark a page as part of a series and point to the following and preceding page, for example …
- Responsive design
Responsive design is a web design approach in which one URL and one HTML document serve every device, while CSS adapts the layout to the …
- Semantic HTML
Semantic HTML means choosing HTML elements by what they mean instead of how they look.
- Separate mobile URLs
Separate mobile URLs are a mobile setup where desktop and phone visitors receive different HTML at different URLs, usually on a subdomain …
- Viewport meta tag
The viewport meta tag (<meta name="viewport">) gives browsers hints about how to size and scale the visible area of a page, mainly on …
- WCAG
The WCAG (Web Content Accessibility Guidelines) are the W3C's technical standard for accessible web content.
- Web accessibility
Web accessibility means that websites, tools and technologies are designed so that people with disabilities can use them.
- XML
XML (Extensible Markup Language) is a text-based format that describes data in nested elements with self-defined tags.