A
Algorithm: A set of rules search engines use to rank pages.
Anchor Text: Clickable text of a link; aim for descriptive, natural phrasing.
Alt Text: Image description for accessibility and context; avoid stuffing.
Authority: Measure of a domain's credibility and trustworthiness based on backlinks and content quality.
AMP (Accelerated Mobile Pages): Google framework for fast-loading mobile pages.
B
Backlink: Incoming link from another website to your site.
Black Hat SEO: Manipulative tactics that violate search engine guidelines.
Bounce Rate: Percentage of visitors who leave after viewing one page.
Breadcrumb: Navigation trail showing page hierarchy; improves UX and SEO.
Bot (Crawler): Automated program that discovers and indexes web pages.
C
Canonical URL: A hint that a URL is the preferred version among duplicates.
CTR (Click-Through Rate): Percentage of impressions that result in clicks.
CWV (Core Web Vitals): LCP, INP, and CLS — real-user performance metrics.
Crawl Budget: Number of pages search bots will crawl on your site in a given timeframe.
CLS (Cumulative Layout Shift): Measures visual stability; target < 0.1.
Conversion Rate: Percentage of visitors who complete desired actions.
D
Domain Authority (DA): Moz metric predicting ranking potential (0–100 scale).
Dofollow: Link that passes authority to the destination page.
Duplicate Content: Identical or very similar content appearing on multiple URLs.
Disavow: Tool to tell Google to ignore specific backlinks.
E
E-E-A-T: Experience, Expertise, Authoritativeness, Trustworthiness — content quality signals.
Entities: Real-world things (people, places, brands) that help disambiguate topics.
External Link: Link pointing to a different domain.
F
Featured Snippet: Selected search result displayed at top of SERPs in a box.
Faceted Navigation: Filtering system common in e-commerce; can create duplicate content.
Findability: How easily users and search engines can discover your content.
H
Hreflang: HTML attribute indicating language and regional targeting.
HTML Sitemap: User-facing page listing site links (differs from XML sitemap).
Heading Tags: H1–H6 tags that structure content hierarchy.
I
Indexing: Process of adding web pages to search engine's database.
Internal Link: Link pointing to another page on the same domain.
INP (Interaction to Next Paint): Measures interactivity; target < 200ms.
Intent (Search Intent): Purpose behind a user's search query.
K
Keyword: Word or phrase users type into search engines.
Keyword Difficulty: Measure of ranking competition for a keyword.
Keyword Stuffing: Overusing keywords unnaturally; penalized by search engines.
Knowledge Graph: Google's database of entities and their relationships.
L
LCP (Largest Contentful Paint): Measures loading speed; target < 2.5s.
Link Equity (Link Juice): Authority passed via internal and external links.
Log File Analysis: Server logs that reveal crawl patterns and bottlenecks.
Long-Tail Keyword: Specific, low-volume search phrase with high intent.
Local Pack: Map with 3 business listings shown for local searches.
M
Meta Description: HTML tag summarizing page content; appears in search results.
Meta Title (Title Tag): HTML tag defining page title; critical ranking factor.
Mobile-First Indexing: Google uses mobile version for indexing and ranking.
N
NAP: Name, Address, Phone — essential for local SEO consistency.
Nofollow: Link attribute that doesn't pass authority.
Noindex: Meta tag preventing page from appearing in search results.
O
Organic Traffic: Visitors from unpaid search results.
On-Page SEO: Optimization of elements on your website.
Off-Page SEO: Activities outside your site (backlinks, brand mentions).
P
PageRank: Google's original algorithm measuring link authority.
Pillar Page: Comprehensive resource covering broad topic; links to cluster content.
PBN (Private Blog Network): Group of sites built to manipulate rankings; black hat.
R
Ranking: Position of a page in search results.
Redirect (301/302): Forwards users and bots from one URL to another.
Robots.txt: File instructing bots which pages to crawl or avoid.
Rich Results: Enhanced search results with extra features (stars, images, FAQs).
RUM (Real User Monitoring): Collecting performance data from actual users.
S
Schema Markup: Structured data that can enable rich results.
SERP (Search Engine Results Page): Page displaying search results.
Sitemap: Machine-readable discovery file listing site URLs.
Search Console: Google tool for monitoring search performance and indexing.
Semantic SEO: Optimizing for topics and entities, not just keywords.
T
Technical SEO: Optimizing site infrastructure for crawling and indexing.
Title Tag: HTML element specifying page title; major ranking signal.
Topic Cluster: Content strategy grouping related pages around pillar content.
Thin Content: Pages with little valuable content; often penalized.
U
URL: Web address of a page.
URL Slug: Last portion of URL after domain (e.g., /seo-guide).
User Intent: Goal user wants to accomplish with search query.
UX (User Experience): Overall experience users have on your site.
W
White Hat SEO: Ethical SEO practices following search engine guidelines.
Word Count: Number of words on a page; depth matters more than length.
X
XML Sitemap: File listing URLs for search engines to crawl.
XPath: Query language for selecting nodes in XML/HTML documents.