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Localization (l10n) involves adapting digital content and applications to meet a specific region or culture’s language and conventions.

The part of a domain that comes before the root domain (e.g., blog.yourwebsite.com is a subdomain whereas yourwebsite.com is the root domain).

Elements are individual HTML components that constitute a webpage’s structure and contents.

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

An algorithm is a set of rules or steps that help solve problems or carry out specific tasks.

The amount of pages your site currently has.

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

You can sort your Collection items in multiple ways — select the field from the Collection you wish to filter from, then select the ordering option.

A color field specifies a graphical color picker or user interface for entering a color into a text field in a seven-character, hexadecimal format.

A hotlink — also known as a remote or inline link — is a hyperlink that directs to a resource, such as an image or a file, without the owner’s explicit permission.

Decryption is the process of reverting encrypted data to its original format.

"Safe" is a Hypertext Transfer Protocol (HTTP) method that doesn't modify the server's state or resources.

A 256 x 256 px image associated with your website that shows up when your website link is saved to an iPhone home screen.

A section of the Add panel that holds multimedia elements like images, video, and Lottie animation.

A form element that lets website visitors submit data to your form handler.

Meta keywords are words or phrases you can include in your web page's metadata.

An argument is an independent value a function receives to deliver a specific output.

The UI state changes how Collection lists display when you’re designing. The Items state is the default option, and shows the items that you have within the Collection. The Empty state doesn’t show these items and gives the designer the opportunity to design for a circumstance if/when there is no data to be displayed in the Collection list.

A form element that allows you to make a selection in a dropdown list.

Cloneable sites are open source (made available under the CC0 (“no rights reserved”) license). When you enable cloning, you allow any user to copy, modify, and use any part of your site for personal or commercial purposes.Sites with cloning turned off do not give others access to copy your site or open it in the Designer.

A second-level domain (SLD) is the part of a domain name that precedes a top-level domain (TLD).

Resolution is a metric measuring clarity and detail through the number of pixels displayed on a screen or used to render an image.

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

The last time your site was published.

Interpolation is a mathematical process that estimates and creates new values based on known values and their relationship.

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.

An inline frame is an HTML element that embeds an HTML document within another webpage.

Available in CMS Collections. You can add videos via a link — not an embed code — from an online video host like Vimeo or YouTube. Just paste in the video link and it’ll appear in the native video format from the 3rd-party video player.

A media query is a CSS technique that applies different styles to a website or an app based on the characteristics of the device displaying it, such as screen size, resolution, and browser viewport.

An element contained within a parent element that has display: flex set.

The far right vertical panel in the Designer that houses the Style panel, Element settings panel, Style manager panel, and Interactions panel.

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

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

Asynchronous programming is an approach where programs simultaneously run multiple operations independently without waiting for previous tasks to complete.

An individual item within a Collection. For example, in a “Blog Posts” Collection, the Collection items are individual blog posts.

The last time someone made a change to your site.

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

Urgency is a marketing term and psychological trigger that incites potential customers and website visitors to act swiftly.

Font weight refers to the thickness or density of a typeface’s strokes.

The vertical bar of tools on the left side of the Webflow Designer. It holds the Add panel, Symbols panel, Navigator panel, Pages panel, CMS panel, Ecommerce panel, Assets panel, Settings panel, Site Activity log, Audits, Search, Video tutorials, and Help.

Agent Instructions are skills and rules that tell an AI agent how to work within a Webflow site or Workspace.

A smoke test, also called build verification testing or confidence testing, is a preliminary examination to determine the basic functionality of a software, website, or application.

Micro conversions are small but important user actions on a website that contribute to the overall conversion funnel.

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

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

Mid-September 2019, new European requirements for authenticating online payments were introduced in Europe as part of the second Payment Services Directive (PSD2). The Strong Customer Authentication (SCA) requirements apply to businesses in the European Economic Area (EEA) that accept online card payments from cardholders whose banks are also located in the EEA.Webflow Ecommerce payments are PSD2 and SCA compliant (i.e., support 3D Secure payments) for European customers.If you’re a merchant in the European Economic Area (EEA), all you need to do to ensure that your Webflow Ecommerce store is PSD2 and SCA compliant for your European customers is to republish your store if it wasn’t published on or after September 11, 2019. Read more about how to make your ecommerce store compliant in our Payment gateway article.

Short for Joint Photographic Experts Group, JPEG is a file format that uses lossy compression to maintain manageable file sizes without compromising image quality.

Left To Right (LTR) describes a text layout that starts from the left and proceeds to the right.

A sidebar, typically positioned on the left or right side of a website or app, is a vertical component that contains supplemental information to enrich a webpage’s primary content.

The CSS border property delineates an HTML element.

Product attributes are specific characteristics that define purchasable merchandise or commodities and provide relevant information to customers.

The first tab in the right-side panel that allows you to assign classes to elements and style them.

A field available in CMS Collections. This field lets you display a date and time in a Collection and/or Collection item.

A measurement unit relative to an element's parent.

You can set any Collection field as "Required," which means that a value must be added to that field in the Collection item before it can be published. The only Collection field that cannot be made required is the Switch field.

A section is an element of design layout that divides a web page into visually distinct segments.

A key, or web key, is a unique identifier that authorizes access to a webpage or service.

NAT (Network Address Translation) is a technique that enables communication between devices with private internet protocol addresses and the public internet.

Ciphertext is unreadable, encrypted data that ciphers use for security during data transit.

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 hit is a request to a web server from a browser for a specific resource.

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

In object-oriented programming (OOP), abstraction conceals irrelevant details so they don’t interfere with the task at hand.

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

The state displayed when a Collection contains no Collection items, which gives you the opportunity to design for a situation where there's no content to display. Check out the Empty States blog for inspiration.

An element that shares the same parent of another element.

Left margin is a CSS property that defines the space between an element's left edge and its surroundings.

A CMS field used in Collections. This powerful field allows you to link to other Collections within your website to populate fields in Collection lists and Collection pages.

A digital certificate is a data file embedded in the site that signals the site’s safety to visitors, internet service providers (ISPs), and servers.

The flex-grow CSS property defines how much an element grows relative to other flexible items inside the same flex parent.

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

Search Engine Optimization (SEO) is a collection of strategies to enhance a website’s ranking and visibility on search engines.

An IP (Internet Protocol) address is a unique string of characters identifying devices connected to the internet.

Authoring Tool Accessibility Guidelines (ATAG) are a layered rule-set that influence how designers and developers create a more accessible internet.

Behavioral targeting is a marketing technique that leverages user data to deliver personalized ads to drive conversions.

A section of the Add panel that houses form elements like inputs, checkboxes, and radio buttons.

The toolbar that appears at the bottom of the Editor. From here, you can access the various Editor panels to manage page settings, dynamic content, forms, and your Editor account. You can also see and publish the changes you make through the Editor.

Empty or void elements are HTML elements that don’t require a closing tag because they contain no content.

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.

Content you create once, then publish in many different places across your website. As you update this content in the CMS, it automatically updates wherever it exists on your site, making it convenient to create and manage larger websites.

A content management system (CMS) is a tool for creating and managing a website and its content.

Inheritance describes a principle where child elements adopt the style properties of parent elements.

An HTML attribute you can use to give a short description of the contents of a webpage. Search engines often display this in results pages (SERPs).

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

JSON, short for JavaScript Object Notation, is a human-readable, lightweight format for recording, storing, and exchanging data.

The <strong> element defines important text with added semantic importance.

Webflow's content management system (CMS) is where dynamic content (Collections and their Collection items) is stored and maintained so you can reference it throughout your site. A CMS lets you input data in one location, then use Collection template pages or Collection lists to display that content without having to update the content displays one at a time.

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

A Library is a shared collection of components, styles, and assets that you can install across multiple sites in a Workspace, so updates to it can propagate everywhere it's installed.

A class is a template that defines variables for objects with similar properties.

Deprecated HTML tags are old tags replaced by updated alternatives in modern web design and development.

A variable font is a single font file that contains multiple weights, widths, or styles, letting you adjust typography continuously instead of loading a separate file for each variant.

Bad neighborhoods are groups of websites that search engines have downgraded because they violate search engine guidelines.

Margins are an essential spacing element of web design, dictating the amount of whitespace between a box and its surroundings.

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

An application context is a set of data that identifies an application’s tasks, where those tasks originate, and how those tasks are configured.

A design approach that prioritizes content planning and production in the design process.

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

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