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All SEO Terms

40 essential SEO terms organized by category. Each term includes a simple explanation, AiSEO score impact, and fix difficulty by role.

AiSEO Score: 100 total — Technical 25 · Meta & On-Page 20 · Content 15 · Performance 15 · Common Files 10 · Structured Data 5 · Links 5 · Security 5

SEO FoundationsTechnical SEOContent QualityPerformance & SpeedStructured DataAI Search & GEOSearch EnginesAuthority & Off-Page
Technical SEO

HTTPS & Web Security

HTTPS encrypts your site's traffic and is a confirmed Google ranking factor. Security headers like HSTS and CSP protect users and signal trustworthiness.

Up to 5 points in the Security category (5% of total score)

Robots.txt

Robots.txt tells search engine crawlers which parts of your site to crawl and which to skip. One wrong line can hide your entire site from Google.

Up to 3 points in the Common Files category (10% of total score)

XML Sitemap

An XML sitemap is a roadmap of your site for search engines. It lists every important URL so Google can find and crawl them efficiently.

Up to 3 points in the Common Files category (10% of total score)

Noindex, Nofollow & Robots Directives

Robots directives (noindex, nofollow) control which pages search engines index and which links pass ranking power. Misuse can invisibly kill your traffic.

Up to 3 points in the Technical category (25% of total score)

IndexNow

IndexNow lets you ping search engines the instant you publish or update content — no waiting for the next crawl. Supported by Bing, Yandex, and others.

Up to 2 points in the Common Files category (10% of total score)

Mobile-Friendly & Responsive Design

Google uses mobile-first indexing — it crawls and ranks the mobile version of your site. If your site isn't mobile-friendly, you're invisible to the majority of searchers.

Up to 4 points in the Technical category (25% of total score)

URL Structure & Clean URLs

Clean, descriptive URLs help both users and search engines understand what a page is about before clicking. Short, keyword-rich URLs correlate with higher rankings.

Up to 3 points in the Technical category (25% of total score)

Redirect Chains & HTTP Status

Redirect chains (A → B → C → D) waste crawl budget and slow down users. Keep redirects to a single hop and fix broken 404 pages.

Up to 3 points in the Technical category (25% of total score)

Canonical URL & Duplicate Prevention

The canonical tag tells Google which version of a page is the 'original' when duplicates exist. Without it, Google splits ranking signals across multiple URLs.

Up to 3 points in the Meta Tags category (20% of total score)

Hreflang & International SEO

Hreflang tags tell Google which language and region each page targets, preventing the wrong version from showing in the wrong country's search results.

Up to 2 points in the Technical category (25% of total score)
Content Quality

Content Quality & Depth

Google's helpful content system rewards pages that provide comprehensive, original answers. Thin or AI-generated fluff pages get demoted.

Up to 5 points in the Content category (15% of total score)

Keyword Optimization

Strategic keyword placement in titles, headings, and body text helps Google match your page to the right searches. Over-optimize and you'll get penalized.

Up to 3 points in the Content category (15% of total score)

Internal Linking Strategy

Internal links distribute PageRank across your site and help Google discover pages. A strong internal link structure is free SEO power most sites waste.

Up to 3 points in the Links category (5% of total score)

Content Freshness Signals

Google uses freshness signals — publish dates, update frequency, schema dates — to determine if content is still relevant. Stale content slowly loses rankings.

Up to 2 points in the Content category (15% of total score)

Duplicate Content

Duplicate content wastes Google's crawl budget and splits ranking power between identical pages. Canonicals, redirects, and unique content are the fix.

Up to 2 points in the Content category (15% of total score)
Performance & Speed

Core Web Vitals

Core Web Vitals are Google's 3 key metrics for user experience — loading speed (LCP), interactivity (INP), and visual stability (CLS). They're an official ranking factor.

Up to 4 points in the Performance category (15% of total score) — umbrella for LCP, INP, CLS

Largest Contentful Paint (LCP)

LCP measures how fast the biggest visible element (hero image, headline) loads. Under 2.5 seconds is good; over 4 seconds means you're losing users.

Up to 3 points in the Performance category (15% of total score)

First Input Delay / INP

INP (replacing FID) measures how fast your page responds to user interactions — clicks, taps, key presses. Under 200ms is good; slow interactivity drives users away.

Up to 3 points in the Performance category (15% of total score)

Cumulative Layout Shift (CLS)

CLS measures how much page content unexpectedly jumps around during loading. A score under 0.1 is good — nobody likes clicking a button that suddenly moves.

Up to 2 points in the Performance category (15% of total score)

PageSpeed Insights

Google's PageSpeed Insights combines lab testing (Lighthouse) and real user data (CrUX) to grade your page 0-100. Aim for 90+ on both mobile and desktop.

Up to 2 points in the Performance category (15% of total score) — based on overall PSI score thresholds

Chrome UX Report (CrUX)

CrUX provides real-world performance data from actual Chrome users — not lab simulations. Google uses CrUX data directly in its ranking algorithm.

Up to 1 point in the Performance category (15% of total score) — bonus for having CrUX field data available

Lazy Loading & Image Optimization

Lazy loading defers off-screen images until needed, cutting initial load time. Combined with WebP/AVIF formats, it can slash page weight by 50%+.

Up to 2 points in the Performance category (15% of total score)

Google Fonts

Free font hosting service by Google — convenient but can hurt performance if not optimized (render-blocking, FOIT/FOUT, extra DNS lookups).

Indirect impact via Performance (CWV) score