Glossary

Plain-language terms for beginner builders

Accessibility

Making a site usable by more people, including keyboard and screen-reader users.

A short text description of an image for screen readers and crawlers.

The server and data layer behind a site when it stores accounts, forms, uploads, or payments.

The compact plan that tells AI who the site is for, what it offers, and what action it should drive.

Cumulative Layout Shift: how much the page jumps around while loading.

Call to action: the main button or link asking the visitor to do one thing.

Readable by search engines and AI assistants because content is public and not blocked.

Largest Contentful Paint: how fast the main visible content appears. Aim under 2.5 seconds.

A tool path where you build visually or with prompts instead of editing code by hand.

Row Level Security: Supabase rules that keep users from seeing data that is not theirs.

A styling system that helps teams build consistent interfaces with utility classes.

JavaScript with guardrails that catch many mistakes before the site ships.

A hosting platform for modern web apps with preview deployments and production hosting.