Save

A Webflow element that displays externally hosted videos such as YouTube and Vimeo.

An em in CSS is a scalable and relative unit of measurement that defines the size of an element relative to its parent's font size.

Semantics accurately represent the structure and purpose of content in computer languages, enabling web developers and programmers to ensure the written code produces an output legible to humans and machines.

BiDi stands for bidirectional. When a document is BiDi, it supports text that reads from right to left and left to right.

Network latency is the time data needs to travel from one point to another, impacting the responsiveness and speed of web applications and services.

Display properties tell browsers how an element should behave on the page. The most common display property keyword category is display: block.

A visible “Made in Webflow” badge displayed in the bottom right corner of Webflow sites. Webflow branding also appears in the site’s HTML. Learn more about Webflow branding.

Prefetch is a technique that proactively loads and caches resources to improve website performance and user experience.

A modal window (or modal) is a web element that displays above all content and restricts user interaction until it’s manually dismissed.

Color gamut describes the full range of colors a device can reproduce on its display.

A web app that helps you connect multiple third-party services together based on triggers and actions.

The element directly above in the hierarchy tree.

The act of updating your live site to reflect new design changes.

A plain text field is an input field for short-form text without formatting or styling.

The American Standard Code for Information Interchange (ASCII) is an encoding standard that assigns numerical values to characters and translates them into computer-readable code.

A Graphical User Interface (GUI) is a visual medium that enables visual interaction with software applications or electronic devices through elements like icons, buttons, and menus.

A Webflow plan that you can add/apply to individual sites. You’ll receive access to different site and hosting features based on your Site plan.

Flex-basis is a CSS property used in flexboxes that sets the initial size of a flex item before it grows or shrinks.

Width defines how wide an element can be. This can be defined in absolute terms (pixels) or relative terms (ems, rems, percentages, viewport-height, or viewport-width).

The second panel on the right side of the Designer. Here, you can change element-specific settings such as the element ID, Custom attributes, Search index settings, Editor settings, etc. You can learn more about the element settings for a specific element by searching for the element’s name on Webflow University.

A section in the Add panel that houses typography elements such as headings and paragraphs.

A bottom bar is a navigation bar at the bottom of an app or webpage.

Top margin is a CSS property that defines the space between the top edge of an element and its surroundings, such as other elements, the browser window, or the edge of a container.

A slider is an interactive design element for scrolling through images, videos, and other multimedia content.

A robots.txt file instructs search engine crawlers which webpages and sections they can or can't crawl and index.

Responsive web design (RWD) is a web development and design approach to create websites, applications, and user interfaces (UIs) that display and function effectively on any device or screen size.

Available in CMS Collections. With this field, you can upload images from your computer and use them as dynamic items in your individual Collection item.

A callback function is passed as an argument to another function and executed upon completing the latter’s task.

Password protection is a security feature restricting certain website areas to authorized users, requiring a secret phrase or key to access them.

Available in CMS Collections. This field offers you a powerful filtering tool for Collection items. For example, you could create a switch labeled "Featured?" for Blog Posts, and then switch on the toggle to showcase particular posts.

The min-width CSS property defines an element's minimum width. This can be defined in absolute terms (pixels) or relative terms (ems, rems, percentages, viewport-height, or viewport-width).

In programming, a deep copy is a replica of an object that doesn’t share the same references as the original. That way, if you make changes to the duplicate, the original stays the same.

A section in the Add panel that contains elements associated with the CMS.

A cipher suite is a collection of encryption algorithms that work together to secure a network connection.

A Webflow component you can use to embed HTML to display external content, plugins, or applications.

A CSS descriptor sets specific properties and values of an at-rule (@-rule) element, dictating its appearance and behavior on a web page.

The amount of pages your site currently has.

The specific domain or subdomain where your Webflow site is displayed.

Webflow's visual content editor. You can access it through the Webflow Dashboard by clicking the “3 disclosure dots” on a site thumbnail, then clicking “Editor.” Guest editors can access it anywhere on their live site by adding ?edit after the page URL (e.g., yoursite.com/page/?edit).

The front-end refers to the visual and interactive part of a website or application that users directly interact with.

To copy an element and its content, styles, and settings.

A call stack is an ordered list of the functions (or stack frames) a program has to execute before it returns a result.

A domain, or domain name, is the unique address that directs to a website on the internet.

Allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually.

A Webflow service that lets you point a custom domain to your Webflow-hosted site.

A Webflow element that displays graphical files on your website.

In CSS, flex-order is a property that allows you to manipulate the default source order of the items within a flex container. Flex-order is especially useful when you want content to display differently on mobile than on desktop.

File Transfer Protocol (FTP) allows for the transfer of files between two parties over TCP/IP-based communication channels, such as the internet.

The title of a page in your site. This is visible in the Pages panel.

A CMS field used in Collections. Just like a reference field, the multi-reference field lets you reference other Collections in your site. But it’s even more powerful, as it lets you reference multiple items within a Collection instead of just 1 item.

A flexbox property that lets you customize the alignment behavior of flex children, based on the main axis of the flex container — that is, whatever you defined as the flex-direction. Options include start, center, end, baseline, and stretch.

Translation inheritance is when a secondary locale automatically mirrors the primary locale's content until a specific field is manually translated, at which point that field stops inheriting further changes.

A Hypertext Markup Language (HTML) tag is a code snippet that defines and describes the structure and content of web pages.

The location your sitemap is stored in relation to your site, and what’s used when submitting your sitemap to search engines.

Conditionals, also known as conditional statements or expressions, are coding instructions that tell a program to execute an action for a certain condition.

MCP (Model Context Protocol) is an open standard that lets AI agents connect to and act within external tools and data sources, like reading or editing a Webflow site.

DNS records store important information about domains and hostnames. They function like maps, directing DNS queries to the desired endpoint.

A navigational aid that displays in the bottom of the Webflow Designer to help you keep track of the element you're interacting with in relation to its hierarchy.

The type of element you're working with, i.e., H1, link, button, etc.

A typography element that is used to link to other pages or sections of a webpage.

A grayscale view of your site’s canvas that visually displays each element’s border, margin, and padding when hovered over.

A document type definition (DTD) defines the structure, validity, and attributes of standard generalized markup language (SGML) documents, such as GML, HTML, and XML.

Syntax error refers to a mistake in code that violates the programming language’s rules and prevents the code from executing correctly.

A measurement unit relative to an element's parent.

A call-to-action (CTA) is a website feature that prompts visitors to perform a specific action.

A child element is an element nested within a parent element in a hierarchy.

A folder is a subdirectory of your site's root folder for organizing web pages.

A content network is a collection of websites where advertisers can pay to display digital ads.

Form blocks allow you to add form elements to a website, including appointment booking, surveys, applications, polls, and contact forms.

An XML (Extensible Markup Language) sitemap is a text file that lists a website's pages to help search engines crawl and index them.

AEO (Answer Engine Optimization) is the practice of optimizing content so it gets surfaced and cited by AI answer engines like ChatGPT, Claude, and Gemini, the AI-era counterpart to traditional SEO.

Custom code that's added just before the closing </head> tag in your site's HTML file. Learn more about custom code in head and body tags.

The main interface where you can build sites.

“Null” represents the absence of a value or the presence of invalid objects in computer science and web development.

The dropdown menu to the right of the Selector field that allows you to access and change the styles of an element when it is hovered, pressed, or focused.

Cryptanalysis examines cryptographic systems to find weaknesses that could allow attackers to uncover plaintext or break encryption.

A user interface (UI) is any visual element humans interact with on a device, webpage, or application.

Compile time is the length of time it takes for a compiler to convert high-level code into low-level code.

Gutters refer to the whitespace between content columns on a webpage.

The color-coded borders of elements you'll see in the Webflow Designer.

The amount of times a site visitor submits data using your site's form(s).

Traffic, or web traffic, refers to the number of users who visit a website over a period of time.

Contextual advertising is a form of paid advertising that matches web content with ad intent.

You can exclude pages from being published to your site by setting them as drafts. These can be unfinished pages, internal pages such as style guides, archived pages saved for backup, etc. Learn more about drafted pages.

JSON-LD is a structured data format that describes a page's content in a machine-readable way, helping search engines and AI crawlers understand what's on the page.

The display: grid CSS property defines a website element (such as a button or header) as a grid container.

Dynamic elements are web page components that can change based on user interaction or external factors, like a live news feed, without requiring a page refresh or reload.

A dropdown menu that displays all the selectors that affect a given element.

The CSS border property delineates an HTML element.

A valid CSS pseudo-class is a keyword that enables styling HTML elements based on their state or position in the document structure or web page.

The base tag specifies the base URL for all relative links within HTML code for a specific page or document.

A website background is a visual element behind webpage content, enhancing aesthetic appeal and user engagement.

You can assign element IDs from the Element settings panel in the Designer. ID selectors are useful for HTML anchors, linking to page sections, or for custom code.

Single Instruction and Single Data Stream (SISD) is a computer architecture where a central processing unit (CPU) executes one instruction at a time on a single data piece.

A blog, short for weblog, is a website or webpage where an individual or group regularly shares content about specific topics, typically in reverse chronological order.

A custom font is any non-system-default typeface you manually upload to your website.

In JavaScript, literals are fixed values written directly into the code.

All elements on the page targeted by the same selector.

Structured Query Language (SQL) is a programming language that enables storing, retrieving, and manipulating information in a relational database.

A Facebook button is a clickable element on a website that allows users to connect to or share content on the social media platform.