Webmaster Glossary

200+ essential web, SEO, hosting, performance & security terms

A

Algorithm

Rules search engines use to rank pages.

Alt Text

Image description for accessibility and SEO.

Anchor Text

Clickable text in a hyperlink.

Analytics

Measurement of website traffic and behavior.

API

Interface allowing systems to communicate.

Above the Fold

Visible content before scrolling.

AJAX

Loads data without reloading pages.

AMP

Framework for fast mobile pages.

B

Backlink

Incoming link from another site.

Bandwidth

Amount of data transferred.

Bounce Rate

Single‑page visit percentage.

Bot

Automated web crawler.

Broken Link

Link pointing to missing content.

Browser Cache

Stored files for faster loading.

C

Cache

Temporary content storage.

Canonical Tag

Preferred URL declaration.

CDN

Distributed content delivery network.

CMS

Content management system.

Crawling

Search engine discovery process.

CSS

Website styling language.

Conversion Rate

Percentage of completed goals.

Core Web Vitals

Performance experience metrics.

D

Domain Name

Website address.

DNS

Domain‑to‑IP translation system.

Duplicate Content

Repeated content across URLs.

Doctype

HTML document declaration.

E

E‑E‑A‑T

Quality evaluation framework.

External Link

Link to another website.

Error 404

Page not found.

Encryption

Data protection method.

F

Featured Snippet

Highlighted SERP result.

Favicon

Browser tab icon.

FTP

File transfer protocol.

Framework

Development foundation.

G

Googlebot

Google’s crawler.

GZIP

File compression method.

GraphQL

API query language.

H

HTML

Web page structure language.

HTTPS

Secure HTTP protocol.

Hosting

Website storage service.

Hreflang

Language targeting tag.

I

Indexing

Storing pages in search engines.

Internal Link

Link within same site.

IP Address

Network identifier.

J

JavaScript

Interactive scripting language.

JSON‑LD

Structured data format.

K

Keyword

Search phrase.

Keyword Density

Keyword frequency.

KPI

Performance metric.

L

Landing Page

Conversion‑focused page.

Lazy Loading

Deferred loading technique.

LCP

Largest content paint.

M

Meta Description

SERP summary text.

Meta Title

Search result headline.

Mobile‑First Indexing

Mobile‑based ranking.

Minification

Code size reduction.

N

Noindex

Index exclusion directive.

Nofollow

Link authority control.

Namespace

Identifier grouping.

O

Organic Traffic

Unpaid visitors.

Open Graph

Social sharing metadata.

P

Page Speed

Load performance.

Pagination

Split content pages.

PPC

Paid click advertising.

Pixel

Tracking script.

R

Redirect

URL forwarding.

Robots.txt

Crawler access file.

Rendering

Page display process.

S

Schema Markup

Structured data.

SEO

Search optimization.

SERP

Search results page.

Sitemap

URL listing file.

SSL

Security certificate.

T

Traffic

Website visits.

TTFB

Server response time.

Tag Manager

Script management system.

U

UI

User interface.

UX

User experience.

URL

Web address.

V

Viewport

Visible screen area.

Virtual Host

Multiple sites per server.

W

Webmaster

Website administrator.

Web Server

Delivers web pages.

White Hat SEO

Guideline‑compliant SEO.

X

XML Sitemap

Structured URL map.

Y

YMYL

High‑risk content category.

Z

ZIP Compression

File size reduction.