SEO Glossary
948 terms from the original searchengineoptimising.com glossary, covering SEO, internet, networking, and web development. Definitions are preserved from the original site — some are period pieces from the 2000s internet, others are still current.
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A
- About
- Above the fold
- Absolute link
- Acquisition
- Acquisition cost
- ActiveX
- Ad broker
- Ad Centre
- Ad inventory
- Adjacency
- Adjacent searching
- Admin Templates
- Adsense
- Advanced search
- Adwords
- Affiliate
- Affiliate marketing
- Affiliate program link
- Affliate Network
- Age
- Agent name delivery
- AI Content Detection
- AI Content Quality Signals
- AI Overviews
- AI Snippet
- Ajax
- Alert Box
- Alexa
- Algorithm
- Algorithm based software
- Algorithmic search
- Aliweb
- Allintitle
- Allinurl
- AlltheWeb
- Alt attribute
- Alt tag
- Alta Vista
- AMP (Accelerated Mobile Pages)
- Analytics
- Anchor text
- Answer Engine Optimisation
- Anthropic-AI
- Applet
- Arbitrage
- Archie
- Architext spider
- Archive
- Article
- Article Schema
- Ask
- Ask Jeeves
- Audience reach
- Authoring Tool
- Authority
- Automated bid management software
- Automated submission
- Autoresponder
- AVIF
B
- B2B
- B2C
- Back link
- Back/Forward Cache
- Backlink
- Backward link
- Bad neighbourhood
- Bad request
- Bait & switch
- Banned
- Banner ad
- Banner blindness
- Banners
- Battelle, John
- Begins with partial word matching
- Bells & whistles
- BERT
- Best of the Web
- Bias
- Bibliomatic analysis
- Bid
- Bing Chat / Copilot
- Black hat SEO
- Blacklisted
- Block level analysis
- Blog
- Blog and ping
- Blog comment span
- Blogger
- Blogroll
- Bloptimization
- Bookmark
- Boolean
- Boolean search
- Bot
- Bounce rate
- Brand
- Brand Mentions in LLMs
- Brand SERP
- Branded keywords
- Breadcrumb navigation
- BreadcrumbList
- BreadcrumbList Schema
- Bridge
- Bridge Page
- Bridge page / bridging page
- Brin, Sergy
- Broken link
- Brotli
- Browser
- Browser compatability
- Business.com
- Buying cycle
C
- Cache
- Canonical URL
- Captcha
- Cascading style sheets
- Cascading StyleSheets (CSS)
- Catagorization
- Catch all listing
- Category
- CCBot
- Certificate
- ChatGPT Browsing
- Chrome User Experience Report (CrUX)
- Citation analysis
- Citation count
- Citation Flow
- Citation Rate
- Classification
- Click Fraud
- Click through
- Click through rate
- Click tracking
- Clipboard
- Cloaking
- Closed loop
- Clustering
- CMS
- Co-citation
- Code bloat
- Collaborative filtering
- Collection fusion
- Combined log file
- Comment (s)
- Comments tag
- Common log file
- Compacted information
- Concept search
- Conceptual links
- Configuration File
- Content Cluster
- Content decay
- Content Gap Analysis
- Content Item:
- Content Management System (CMS)
- Content pruning
- Content Refresh
- Content-based filtering
- content-visibility
- Contextual advertising
- Conversational Search
- Conversion
- Conversion cost
- Conversion point
- Conversion rate (CR)
- Cookie
- Copyright
- Core update
- Core Web Vitals
- Cosine similarity
- Cost per click C-P-C (CPC)
- Cost per thousand
- Counter
- Counter / page counter
- CPA
- CPC
- CPL
- CPM
- Crawl
- Crawl Budget
- Crawl depth
- Crawl frequency
- Crawl Rate Limit
- Crawlability
- Crawler
- Critical CSS
- CRM
- Cross linking
- CSS
- CSS (Cascading style sheets)
- CTR
- Cumulative Layout Shift (CLS)
- Cumulative Layout Shift Sources
- Cutts, Matt
- Cyberspace
- Cybersquatting
D
- Dance
- Dashboard
- Data traffic
- data-nosnippet
- Dataset
- Date range / date limit
- Dayparting
- De-listing
- Dead link
- Dedicated server
- Deep Link Ratio
- Deep link ration
- Deep linking
- Del.icio.us
- Demographics
- Description
- Description tag
- DHTML
- Digg
- Direct hit
- Directory
- Disavow File
- DLL
- DMOZ
- DNS
- DNS parking
- DNS Record
- Document Object Model (DOM)
- Document streams
- Dofollow
- Dogpile
- Domain / domain name
- Domain Authority
- Domain Name
- Domain Rating
- Doorway page
- Double Click
- Dreamweaver
- Drill down
- DTD
- Duplicate content
- Dwell time
- Dynamic content
- Dynamic HTML (DHTML)
- Dynamic optimization
- Dynamic Page
- Dynamic Rendering
E
- E-Commerce
- E-E-A-T (Experience, Expertise, Authoritativeness, Trust)
- Early Hints (HTTP 103)
- Edge SEO
- Editorial link
- Electronic library
- Emphasis
- Entity Salience
- Entity SEO
- Entry page
- EPC
- EPV
- Error 400
- Error 401
- Error 403
- Error 404
- Error 500
- Error 501
- Error 503
- Ethical SEO
- Everflux
- Evergreen Content
- Exact match
- Excite
- Expert document
- Expert index
- Expert link
- Expert page
- Expert Roundup
- Expired domain
- Expired Domain Abuse
- External link
- Eye candy
F
- FAA
- Faceted Navigation
- Facted search
- Fair use
- Fake copy listing
- False drop
- Fan-Out Queries
- FAQ schema
- Favicon
- Featured Snippet
- Feed
- Feed aggregator
- Feed reader
- fetchpriority
- FFA
- File System
- Filter
- FindWhat
- Firefox
- First Contentful Paint (FCP)
- First Input Delay (FID)
- Flash page
- Format
- Frame
- Frames
- Frequency cap
- Fresh content
- Front-end (Site Frontend)
- Frontpage/ Front Page
- FUD
- Full-text search engine / full-text inde
- Fuzzy matching
- Fuzzy search
G
- G / GG
- GAP
- Gateway
- Gateway Page
- GDPR Cookie Banner
- Generative Engine Optimisation
- Generative Engine Optimisation (GEO)
- Generative Search
- Ghost domain
- Ghost site
- Gimpsey
- Go.com
- Godin, Seth
- GoGuides.org
- Google base
- Google bomb / Google bombing
- Google bowling
- Google Business Profile
- Google checkout
- Google dance
- Google Discover
- Google juice
- Google keyword tool
- Google onebox
- Google sitemaps
- Google supplemental index
- Google traffic estimator
- Google trends
- Google website optimiser
- Google whacking
- Google-Extended
- Googlebot / Google bot
- Googlebot IP Verification
- Googlewashing
- Goto / go to
- GPTBot
- Graphical search inventory
- Guest Post
- Guestbook spam
- Gulliver
H
- Hallucination Grounding
- Hallway
- Hand submission
- Heading / heading tag
- Headings
- Headline
- Helpful Content Update
- HFS
- Hidden Gems Update
- Hidden text
- Hierarchical clustering
- Hijacking
- Hilltop
- Hit
- Hit-and-run-page
- HITS
- Home directory
- Home Page
- Homepage / Home page / Home
- Hop Count
- Host
- Host Load
- Hot bot
- Hot linking
- Hover
- HowTo Schema
- Hreflang
- hreflang Return-Tag Errors
- hreflang x-default
- HTML
- HTTP
- HTTP/3
- HTTP/3
- HTTPS
- Hub-and-Spoke Linking
- Hummingbird
- Hydration
- Hyperlink
- Hyperlink / link
- Hyperlink induced traffic search
I
- iBL
- ICF
- Image Alt Text
- Image map
- Image Pack
- Image sitemap
- Image tag
- Impression
- Inbound link
- Index
- Index Bloat
- Index file
- Indexability
- indexifembedded
- Information architechture
- Information extraction / information fil
- Information gain
- Information retrieval
- Infoseek
- Inktomi
- INP
- Installers
- Interaction to Next Paint (INP)
- Internal Anchor Text Optimisation
- Internal link
- Internal linking
- International SEO
- Internet explorer
- InterNIC
- Intro Text
- Inverse document frequency (IDF)
- Inverted file
- Invisible text
- Invisible web
- IP Address
- IP delivery
- Islands Architecture
- ISP
- Item
J
K
- Kanoodle
- Keyword
- Keyword Density
- Keyword difficulty
- Keyword domain name
- Keyword funnel
- Keyword meta tag
- Keyword Phrase
- Keyword phrase / key phrase
- Keyword purchasing
- Keyword ratio
- Keyword research
- Keyword research tools
- Keyword search
- Keyword stuffing
- Keyword tag / keywords tag
- Keyword targeting
- KFCP
- Kickback marketing
- KISS
- Kleinberg, Jon
- Klog
- Knowledge Graph
- Knowledge Graph Entity
- Knowledge Panel
L
- Landing page
- Landing page quality scores
- Largest Contentful Paint (LCP)
- Latency
- Latent Semantic Indexing
- Lazy Hydration
- Lazy Loading
- LCP Element
- LDAP
- Lead
- Leaderboard
- Leaf
- Lighthouse
- Link
- Link / hyperlink
- Link baiting
- Link building
- Link bursts
- Link checker / link validation
- Link churn
- Link Decay
- Link equity
- Link Equity Dilution
- Link Farm
- Link hoarding
- Link Popularity
- Link popularity / linkage
- Link Reclamation
- Link reputation
- Link rot
- Link swop / link swap
- Link tracking
- Link velocity
- Linkable content
- Linkage
- Listicle
- Live.com
- LLM Visibility
- llms-full.txt
- llms.txt
- Load
- Local Citations
- Local Pack
- LocalBusiness Schema
- Localhost
- Log file
- Log file analysis
- Login
- Logspam / log spamming
- Long tail / longtail
- Long-tail keyword
- Looksmart
- Lossy Redirects
- LSI
- Lycos
M
- Macintosh
- Magellan
- Main Body
- Main Text
- Mambot
- Manual review
- Manual submission
- March 2024 Core Update
- Mass submission
- Match
- Match driver
- max-image-preview
- max-snippet
- max-video-preview
- Media Files
- Medic Update
- Meme
- Meta description tag
- Meta keywords tag
- Meta refresh
- Meta robots tag
- Meta search engine
- Meta Tag
- Meta tags
- Metacrawler
- Metadata
- MFA
- Mindshare
- Mining company
- Mirror
- Mirror Site
- Mirror sites
- Mirroring
- Mobile-First Indexing
- Mobilegeddon
- Model-Aware Schema
- Modules
- Mosaic / NCSA Mosaic
- Most wanted respsonse (MWR)
- Mouse
- Mousetrapping / circle jerking
- Movable type
- Moved permanently
- Mozilla
- MSN search
- Multi-Location SEO
- Multidimensional scaling
- MUM (Multitask Unified Model)
- MySpace
- MySQL
N
O
P
- Page jacking / pagejacking
- Page popularity
- Page view / page impression / page reque
- Page, Larry
- Pagerank
- PageRank hoarding
- PageSpeed Insights
- Pagination (SEO)
- Paid inclusion
- Paid listing
- Panda
- Parasite SEO
- Partytown
- Passage Ranking
- Paste
- Pay for performance
- Pay per lead / PPL
- Pay-per-click search engine
- Penalty
- Penguin
- People Also Ask (PAA)
- Permalink
- Perplexity Rank
- PerplexityBot
- Personalization
- Personally identifiable information
- Pharming
- Phishing
- Phrase search
- Pillar Page
- Placement
- Plug-in
- Pogo-sticking
- Poison word
- Politeness window
- Polls
- Pop-under / popup / pop up
- Popunder
- Popup
- Portal
- Portal page
- Portal site
- Position Zero
- Positioning
- PostScript
- PPC
- PPC / Pay per click
- PPL
- PPV
- PR
- PR0 / PR zero
- Pre / Postcoordination of terms
- Pre-rendering
- Precision
- Preconnect
- Prefetch
- Preload
- Prerender
- Preview
- Priority Hints
- Private Blog Network (PBN)
- Probablistic model
- Product Reviews Update
- Product Schema
- Programmatic SEO
- Progressive Web App (PWA)
- Projects
- Promotion
- Prompt Stuffing
- Proximity
- Proximity searching
- Proxy Server
- PSA
- Published
Q
R
- R/S ratio
- RankBrain
- Ranking
- Re-submission
- Real User Monitoring (RUM)
- RealNames
- Recall
- Reciprocal link
- Redirect
- Redirect Chains
- Redirect Loops
- Referrer
- Refresh / refresh tag
- Registrar
- Registration
- Reinclusion
- Relative link
- Relevance / relevancy
- Relevancy algorithm
- Render Budget
- Render-Blocking Resources
- Reputation management
- Resource Hints
- Results list
- Retrieval-Augmented Generation (RAG)
- Reverse index
- Reverse Silo
- Review Snippet
- Reviews System
- Rich Results Test
- Right Click
- Robot
- Robots.txt
- Robots.txt / robots text file
- Robots.txt Allow Precedence
- ROI
- Root
- RSS
S
- Safari
- Salton, Gerard
- sameAs Property
- Scaled Content Abuse
- Schema.org
- Scooter
- Score
- Scored keyword phrase
- Script
- Search
- Search Console
- Search engine
- Search engine marketing / optimisation /
- Search Generative Experience (SGE)
- Search history
- Search hours
- Search Intent
- Search jacking
- Search marketing
- Search results
- Search terms
- Search Tree
- Search volume
- SearchKing
- SEM
- Semantic Chunking
- Semantic search
- SEO
- SEO coywriting
- SERP
- SERP Feature
- Server logs
- Server-Side Rendering (SSR)
- Server-side scripting
- Server-Side Tagging
- Server-Timing Header
- Service Area Business
- Service worker
- Session ID
- Shadow domain
- Sidewinder
- Similarity
- Singular value decomposition
- Siphoning
- Site
- Site Hit
- Site Reputation Abuse
- Site search
- Sitelinks
- Sitemap
- Sitewide Links
- Skewing
- Skin
- Skyscraper
- Slashdot
- Slurp
- Snippet
- Social media
- Soft 404
- Sorting results
- Spam
- SpamBrain
- Spamdexing
- Spamming
- Speakable Schema
- Speculation Rules API
- Spider
- Spider / spyder
- Spider Trap
- Spidering
- Splash page
- Splog
- Sponsored link
- Spoofing
- Spyware
- Squidoo
- SSI
- Static content
- Static Content Item
- Static Page
- Static Site Generation (SSG)
- Stats / statistics
- Stealth
- Stemming
- Stop character
- Stop words
- Streaming SSR
- Structured Data
- Sub-category
- Subdomain
- Subject-specific popularity
- Submission
- Submission rules
- Submission service
- Submission software
- Submit
- Substring matching
- Sullivan, Danny
- Supplemental results
- Syndication
- Systray
T
- T-Rex
- Tag
- Taxonomy
- Technorati
- Templates
- Teoma
- Term frequency (TF)
- Term vector database
- Term vectors
- Termination page
- Text Editor
- Text link ads
- TF-IDF
- The tragedy of the commons
- Theme engine
- Thesaurus
- Third-Party Cookies
- Throwaway domain
- Time to First Byte (TTFB)
- Title
- TLD
- Top Stories
- Top-level page
- Topic-sensitive PageRank
- Topical Authority
- Topical Cluster
- Total Blocking Time
- Trackback
- Traffic
- Traffic-death redesign
- Trust Flow
- TrustRank
- Turbo10
- Tutorial
- Twitter Card (X Card)
- Type-less search engine
- Typepad