Plain-English Definitions

Web, App & Marketing Glossary

32 plain-English definitions for the terms web designers, app developers, and marketers throw around — written for business owners.

Responsive Web Design: A design approach that ensures a website adapts gracefully to any screen size — phones, tablets, laptops, and large desktops. Pages are built with flexible grids, fluid images, and CSS media queries so a single codebase serves every visitor without redirects or device-specific URLs. Responsive design is now a Google ranking signal and is the only practical way to maintain a single canonical URL across devices.
Mobile-First Design: A design methodology where layouts, content priority, and interactions are designed for the smallest screen first, then progressively enhanced for larger viewports. Because Google indexes the mobile version of every site (mobile-first indexing), a mobile-first build typically delivers better Core Web Vitals, faster load times, and stronger search rankings than a desktop-first design retrofitted to phones.
UI / UX: UI (user interface) is the visual layer — colors, typography, buttons, spacing — that a visitor sees and touches. UX (user experience) is the broader workflow: how easily someone can find information, complete a task, or convert. Strong UI without strong UX is a beautiful site nobody can use; strong UX without strong UI feels untrustworthy. Both must work together.
Content Management System (CMS): Software that lets non-developers create, edit, and publish website content without writing HTML. Popular examples include WordPress, Webflow, Sanity, and headless CMS platforms like Contentful. A CMS makes it easy to keep a site fresh — which matters for SEO because search engines reward sites with regular, current content over stale pages.
Wireframe: A low-fidelity, gray-box layout that shows the structure of a page before any visual design is applied. Wireframes lock in content hierarchy, button placement, and user flow without distraction from colors or imagery. Approving wireframes early keeps revision cycles cheap — once visual design starts, layout changes are 5–10× more expensive.
Prototype: A clickable simulation of a website or app that demonstrates real interactions before code is written. Prototypes let stakeholders test flows, surface usability issues, and align on scope. Our free working demo is a prototype taken one step further — it is built in production code so what you approve is exactly what you launch.
Core Web Vitals: Three Google-defined metrics measuring real-world page performance: Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness), and Cumulative Layout Shift (visual stability). They factor into Google rankings and directly affect bounce rate. Sites that pass all three on mobile typically out-rank competitors that fail even one.
Page Speed: How fast a page loads, becomes interactive, and renders its main content. Slow pages lose visitors before they ever see your offer — Google has shown that bounce rate climbs by ~32 percent when a page goes from one to three seconds to load. Page speed is a confirmed ranking factor and a non-negotiable for paid traffic ROI.
Search Engine Optimization (SEO): The practice of improving a website so it ranks higher in unpaid search results for queries your customers actually type. SEO covers technical work (site speed, schema, crawlability), on-page work (titles, headings, content), and off-page work (backlinks, citations, reviews). Strong SEO compounds: every page you publish adds to a permanent asset that earns traffic for years.
Local SEO: A subset of SEO focused on ranking for queries with local intent — searches like "web designer near me" or "Cedar City plumber". Local SEO combines an optimized Google Business Profile, consistent NAP (name, address, phone) across the web, location-specific landing pages, and reviews. Done well, it puts your business in the Google Map Pack — the three-result block above the regular results.
SERP (Search Engine Results Page): The page Google returns after a search. Modern SERPs include not just blue links, but featured snippets, AI overviews, the local 3-pack, image carousels, video results, People Also Ask boxes, and shopping results. Each of those modules is a separate ranking opportunity, which is why structured data (schema) and well-formatted answers matter as much as traditional ranking factors.
Schema Markup: Structured data added to a page in JSON-LD format that tells search engines exactly what the page is about — a business, an article, a product, a recipe, a FAQ. Schema doesn't directly boost rankings, but it unlocks rich results (star ratings, FAQ accordions, business hours) which dramatically improve click-through rates. AI search engines increasingly rely on schema to cite sources accurately.
Backlink: An incoming link from another website to yours. Google still treats high-quality backlinks as one of its top ranking signals because they're votes of confidence from independent publishers. A few links from authoritative, topically-relevant sites are worth more than hundreds of links from low-quality directories. Spammy or paid links can trigger penalties, so the safest path is earning links by publishing genuinely useful content.
Meta Description: A 150–160 character snippet that appears under your page title in search results. It doesn't directly affect rankings, but it heavily influences click-through rate, which does. A strong meta description previews the value on the page, includes the primary keyword once naturally, and ends with a clear next step (e.g. "Get a free quote").
Keyword Research: The process of finding the specific phrases your customers type into search engines, then matching pages on your site to those phrases. Good keyword research balances search volume (how many people search), intent (are they ready to buy?), and difficulty (can you realistically rank?). Skipping it is the #1 reason small business sites fail to attract organic traffic.
AEO (Answer Engine Optimization): A discipline focused on getting your content cited in AI-powered answer engines like ChatGPT Search, Perplexity, Google AI Overviews, and Claude. AEO emphasizes structured answers, clean schema, factual accuracy, and clear authorship. Unlike traditional SEO where you compete for clicks, AEO is about being the source the AI quotes — which builds long-term brand authority even when the user doesn't click through.
E-E-A-T: Google's quality framework: Experience, Expertise, Authoritativeness, Trustworthiness. It's how Google evaluates whether a page deserves to rank, especially for health, financial, and legal topics. Practical E-E-A-T signals include named authors with bios, real business addresses and phone numbers, transparent pricing, customer reviews, and citations from authoritative sources.
Canonical URL: The single, official URL Google should index when multiple URLs return the same or similar content. Canonical tags consolidate ranking signals — without them, link equity gets split across www/non-www, http/https, or trailing-slash variants. Every page on your site should have a self-referencing <link rel="canonical"> pointing to the version you want to rank.
Native App: An app built specifically for one platform using that platform's official languages — Swift or Objective-C for iOS, Kotlin or Java for Android. Native apps deliver the best performance, full access to device features (camera, biometrics, push notifications), and the smoothest animations. The trade-off is cost: you maintain two separate codebases.
Cross-Platform App: An app written once and deployed to both iOS and Android using a framework like React Native, Flutter, or Expo. Cross-platform development cuts initial cost by roughly 40–60 percent and keeps the two app stores in sync, but you may sacrifice a small amount of performance for animation-heavy or hardware-intensive apps. For most small business apps, cross-platform is the right call.
Minimum Viable Product (MVP): The smallest version of a product that delivers real value to a defined user and lets you test the core hypothesis. An MVP intentionally excludes nice-to-haves so you can launch in weeks instead of months, gather usage data, and iterate based on what users actually do — not what stakeholders assume they want. Most successful apps started as deliberately small MVPs.
Progressive Web App (PWA): A website that behaves like an app — installable to the home screen, offline-capable, push-notification ready — without going through the App Store or Play Store. PWAs are dramatically cheaper than native apps to build and maintain, and Google indexes them like any other website. They're a strong choice for content-heavy or transactional apps that don't need deep hardware integration.
API (Application Programming Interface): A defined contract that lets two software systems exchange data. APIs are how your website talks to Stripe to process payments, how your app pulls weather data from a third party, or how your CRM syncs leads from your contact form. Modern apps and websites are mostly glue code between APIs — the better the APIs, the faster the build.
App Store Optimization (ASO): The app-store equivalent of SEO. ASO covers your app name, subtitle, keywords, description, screenshots, ratings, and download velocity. Strong ASO can 5–10× organic installs without spending a dollar on ads. Like SEO, the basics — accurate keywords, compelling screenshots, and steady reviews — outperform clever tricks every time.
Push Notifications: Short messages an app or website can send to a user's device even when the app is closed. Done well, they re-engage dormant users and drive 3–5× more retention. Done badly, they get apps deleted. Best practice: only notify when there is a clear personal benefit (a delivery update, an appointment reminder), not when you want attention.
Call to Action (CTA): A button, link, or instruction that tells a visitor exactly what to do next — "Get a free quote," "Book a demo," "Call now." Strong CTAs are specific, action-oriented, and visually distinct. The most common mistake is offering too many CTAs on one page; the second most common is offering vague ones like "Learn More."
Conversion Rate: The percentage of visitors who take a defined action — submit a form, request a quote, complete a purchase. Conversion rate is the single most leveraged number in marketing: doubling it doubles your revenue without spending an extra cent on ads. Most small business sites convert 1–3 percent of visitors; a well-designed site routinely hits 5–10 percent.
Lead Magnet: A free, valuable resource — a checklist, a guide, a calculator, a template — offered in exchange for a visitor's email address. Lead magnets work because they convert anonymous traffic into known prospects you can nurture over time. The best lead magnets solve a single specific problem your ideal customer has right now.
Marketing Funnel: The journey a customer takes from first hearing about you to becoming a paying client and beyond — typically described as awareness, interest, consideration, decision, and retention. Each stage needs different content: blog posts and ads for awareness, case studies and demos for consideration, testimonials and pricing for decision. A leaky funnel at any stage caps revenue everywhere downstream.
CPC (Cost Per Click): What you pay every time someone clicks your paid ad. CPC is set by auction — competitive industries like legal, insurance, and home services routinely pay $20–$100 per click on Google Ads. Lowering CPC requires improving your Quality Score: writing tighter ads, sending traffic to fast, relevant landing pages, and choosing keywords that match user intent.
ROAS (Return On Ad Spend): Revenue generated for every dollar spent on advertising — for example, $4 in revenue from $1 in ads is a 4× ROAS. ROAS is the headline number in performance marketing because it tells you whether to scale spend up or pull it back. Tracking ROAS accurately requires conversion tracking that connects ad clicks all the way through to closed revenue.
Brand Identity: The complete visual and verbal system that represents a business — logo, color palette, typography, imagery style, voice, and messaging. A consistent brand identity makes a company instantly recognizable across a website, social media, ads, packaging, and email. Inconsistent branding is the fastest way to look smaller and less trustworthy than you actually are.