The web, no-code, SEO & AI glossary

Parallax scrolling moves background and foreground layers at different speeds to create depth. Learn how it works, its risks and best practices.

A lead magnet is a free resource offered in exchange for contact details. Learn the main types, what makes one work and how to measure it.

Keyword research finds the search terms your audience uses and ranks them by volume, difficulty and intent. Learn the method and the tools.

The customer journey maps every touchpoint from awareness to purchase and loyalty. Learn its stages, how to map it and how it improves conversion.

An AI agent uses a language model to plan, use tools and complete tasks autonomously. See how agents work, how they differ from chatbots and when to use them.

A content audit reviews every page of a site to keep, update, merge or remove it. Learn the steps, metrics and mistakes to avoid to improve SEO results.

Design handoff is how designers pass finished work to developers. Learn what to include, how to avoid rework and how tokens and specs smooth the transfer.

Web scraping is the automated extraction of data from web pages. Learn how it works, how it differs from an API, the main tools and the legal limits to respect.

Topical authority measures how thoroughly a site covers one subject. Learn how it works, how to build it with clusters and how it differs from DA.

A design sprint is a five-day process to go from a problem to a tested prototype. Discover the steps, who takes part and how it differs from design thinking.

A/B testing compares two versions of a page on live traffic to see which converts better. Learn the method, the common mistakes and what to test first.

Keyword cannibalization is when several pages of one site compete for the same query. Learn how to detect it and fix it with merges, redirects and linking.

Search intent is the goal behind a search query. Learn the four types, how to identify intent on the SERP and how to match it in your content.

A user flow maps the steps a visitor follows to reach a goal. Learn its symbols, how to build one, and how it differs from a wireflow.

Information architecture organises and labels website content. Learn its components, methods such as card sorting, and its impact on SEO.

Technical debt is the future cost of quick technical shortcuts. Learn where it comes from, its types and how to manage it without slowing delivery.

Web components are native browser standards to build reusable custom HTML elements. Learn how they work, how they differ from frameworks and when to use them.

A feature flag turns a feature on or off without deploying code. Learn how flags work, their types, best practices and the pitfalls to avoid.

Progressive enhancement builds a solid HTML baseline, then layers CSS and JavaScript on top. Learn the principle, examples and benefits.

HTTP headers are metadata exchanged between browser and server. Learn what they are, the main types, security headers and best practices.

Minification strips whitespace and comments from code to cut file size and speed up pages. Learn how it works, the tools and best practices.

Server-side rendering (SSR) builds a page's HTML on the server per request. Definition, how it works, SSR vs client-side rendering, SEO and speed impact.

A content security policy (CSP) is an HTTP header restricting which sources a page can load from, blocking XSS and injected scripts. Syntax and directives.

WebP compresses images smaller than JPEG or PNG at similar quality. Definition, lossy vs lossless, browser support, impact on Core Web Vitals.

Load balancing spreads traffic across servers so none is overwhelmed. Definition, how it works, algorithms, types, best practices.

Microservices split an app into small independent services. Definition, how they communicate, microservices vs monolith, best practices.

A single-page application (SPA) loads once and updates content with JavaScript. Definition, how it works, SPA vs multi-page sites, SEO impact.

Lazy loading delays fetching images and content until they near the viewport, speeding up page load. Definition, HTML attribute, best practices for SEO.

Rate limiting caps requests per client to protect APIs and login forms from overload. Definition, algorithms (token bucket, sliding window), best practices.

A static site generator (SSG) pre-builds HTML pages at build time for faster, more secure sites. Definition, how it works, and best practices.

Headless commerce separates the backend engine from the storefront design. How it works, MACH architecture, and use cases.

First-party data is information a brand collects directly from its audience. Learn how it's gathered, used, and why it matters for privacy.

A dark pattern is a manipulative UI design that tricks users into unwanted actions. Learn the main types, legal risks, and how to avoid them.

A conversion pixel is a tracking snippet that fires when a visitor completes a target action, reporting it to an ad or analytics platform.

A data layer is a JavaScript object that structures page and event data so tag managers and analytics tools can read it consistently.

WebAssembly (Wasm) is a portable binary format that runs compiled code in the browser at near-native speed, alongside JavaScript.

Semantic versioning (SemVer) numbers releases as MAJOR.MINOR.PATCH to signal compatibility. Rules, pre-release tags, and best practices.

Edge computing processes data on servers near the user instead of a distant data centre. How it works, deployment types, and use cases.

A browser cache stores web assets locally to speed up repeat visits. How Cache-Control and ETag work, cache types, and best practices.

Retargeting shows ads to people who already visited your site, using a tracking pixel. How it works, types, and best practices to boost conversions.

Cookie consent is a visitor's explicit permission before non-essential cookies are set. GDPR rules, consent categories, and CMP best practices.

REST is a lightweight style for building APIs over HTTP and JSON. SOAP is a stricter XML protocol for formal, transaction-heavy exchanges.

CI/CD automates the build, test and release of code on every change, replacing large manual releases. Definition, pipeline example, best practices.

iPaaS is a cloud platform that connects apps and automates data flows between them, no custom code. Definition, examples, tools like Make and Zapier.

An embedding is a numeric vector that captures the meaning of content, used for semantic search and RAG. Definition, examples, code.

Micro-interactions are small, single-purpose moments of interface feedback that confirm or guide a user's action, such as a hover state or a like animation.

Atomic design builds interfaces from small reusable components, atoms, assembled into molecules, organisms, templates and pages.

RPA is software using bots to mimic human clicks and keystrokes, automating repetitive, rule-based tasks without changing existing applications.

Anchor text is the clickable, visible text of a hyperlink. Types, SEO impact, and best practices for internal links and backlinks.

Duplicate content is identical or near-identical text across multiple URLs. Causes, SEO risks, and how to fix it with canonical tags.

A long-tail keyword is a long, specific search query with lower volume but higher intent. Examples, types, and why they matter for SEO.

Serverless runs code in provider-managed functions with no server to maintain. How it works, FaaS vs BaaS, and common pitfalls explained.

A URL slug is the readable, final part of a page's web address. How slugs work, best practices, and their impact on SEO.

Organic traffic is visits from unpaid search results. How it is tracked, organic vs paid traffic, and how to grow it sustainably.

A semantic cocoon groups related pages around a pillar topic through internal links to concentrate SEO authority. Structure, benefits, examples.

A nofollow link carries rel="nofollow" and tells search engines not to pass ranking credit. Syntax, when to use it, and impact on SEO.

Alt text is the HTML attribute that describes an image for screen readers and search engines. Syntax, best practices, and SEO impact.

Product-market fit is when a product meets real market demand well enough that customers want and keep using it. Signs, how to measure it, and how to reach it.

Full stack means covering both the front end and back end of an application. What a full-stack developer does, full-stack frameworks, and when to hire one.

OAuth lets a user grant an app limited access to their data without sharing a password. How the flow works, grant types, and OAuth vs OpenID Connect.

A subdomain is a prefix before a domain, like blog.example.com. How subdomains work, subdomain vs subdirectory, and how to set up a DNS record.

Dark mode shows light text on a dark background to reduce eye strain and save battery. How it works, prefers-color-scheme, and dark vs light mode.

Indexing is how a search engine crawls, analyzes, and stores a page so it can rank. Indexing vs crawling, common blockers, and how to check index status.

Bounce rate measures visits with no further interaction. How it's calculated in GA4, what counts as a bounce, and its real SEO impact.

A CTA is the button or link that tells a visitor what to do next. How to write one, CTA types, and its real impact on conversion rate.

A 404 page is what visitors see when a URL doesn't exist. How the status code works, what a good page includes, and its real SEO impact.

Domain authority predicts how well a site is likely to rank in search, based on its backlinks. How it is calculated, and DA vs page authority.

A CDN caches a site's content on servers near each visitor to speed up delivery. How it works, what it caches, and CDN vs hosting vs edge computing.

Lead generation captures the contact details of interested visitors, turning them into leads. How it works, inbound vs outbound, best practices.

A large language model (LLM) predicts and generates text from a prompt. How it works, types, LLM vs traditional NLP, and common pitfalls.

A conversion funnel is the path from awareness to action a visitor follows before converting. Stages, funnel types, metrics and how to fix leaks.

A buyer persona is a research-based profile of an ideal customer. How to build one, persona vs target audience vs ICP, and common pitfalls.

A proof of concept tests if an idea is technically feasible before any investment. What it includes, POC vs prototype vs MVP, and best practices.

GraphQL is an API query language letting clients fetch exactly the data they need in one call. Syntax, core concepts, and GraphQL vs REST API.

Design thinking is a user-first method built on 5 stages: empathize, define, ideate, prototype, test. How it works and how it differs from UX design.

Cloud computing delivers servers, storage and databases on demand over the internet. Service models, benefits, and trade-offs explained.

A framework is a pre-built structure of code developers build on. Types, framework vs library, and how to choose one for a project.

An SSL certificate encrypts traffic between a browser and a server and enables HTTPS. Types, how the handshake works, and setup best practices.

Typography is the art of arranging type. Typeface classes, web fonts, hierarchy, readability and accessibility explained clearly with examples.

Open source is software with public, modifiable source code. Licences, permissive vs copyleft, benefits and limits explained clearly with examples.

DNS translates domain names into IP addresses. Record types, propagation, TTL and common pitfalls explained clearly, with practical examples.

Fluid typography scales text smoothly with the screen using CSS clamp(), instead of jumping at breakpoints. The formula, accessibility, and a fluid scale.

A container query applies CSS based on a parent's size, not the screen. How it works, container versus media query, and container query units.

Viewport units (vw, vh, vmin, vmax, dvh) size elements relative to the screen. The units, the mobile 100vh problem, and best practices.

The rem is a CSS unit relative to the root font size, so 1rem is usually 16px. rem versus em versus px, and why rem improves accessibility.

The aspect-ratio CSS property sets an element's width-to-height proportion. How it works, why it reduces layout shift (CLS), and the old padding hack.

CSS variables (custom properties) store a value once and reuse it across a stylesheet. How to declare them with var(), scope, and versus Sass variables.

The CSS box model describes every element as content, padding, border and margin. The four layers, content-box versus border-box, and margin collapsing.

A breakpoint is the screen width at which a layout changes. Common breakpoints, content-first versus device-first, and the mobile-first approach.

A CSS transition animates a property from one value to another over a duration. The four transition properties, transition versus animation, best practices.

The z-index is a CSS property that sets the stacking order of overlapping elements. How stacking contexts work and why z-index sometimes fails.

A CSS animation changes an element's styles over time with keyframes. How it works, animation versus transition, and performance best practices.

A media query applies CSS styles only when conditions like screen width are met. How it works, common breakpoints and the mobile-first approach.

What ROI (return on investment) means, the formula to calculate it, why it matters and its limits for marketing and web projects.

What Git is, how distributed version control works, key concepts (commit, branch, merge) and how Git differs from GitHub.

What a KPI (key performance indicator) is, how it differs from a metric, examples by function and how to choose the right ones.

What machine learning is, how it works, its main types (supervised, unsupervised, reinforcement) and how it powers AI features and automation.

What internal linking is, why it matters for SEO, and best practices to structure links between your pages so Google crawls and ranks them better.

What a brand style guide is, what it contains (logo, colours, type, tone) and why it keeps your design system consistent across every touchpoint.

A typography scale is a set of font sizes related by a consistent ratio, creating clear hierarchy and harmony across all text on a site.