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SEO Glossary

Domain Authority
A 1-100 score predicting how well a domain will rank in search results.
Keyword Difficulty (KD)
An estimate of how hard it is to rank on page 1 for a keyword.
SERP
Search Engine Results Page — what users see after a query.
Backlink
A link from another website pointing to yours; a core ranking signal.
Canonical Tag
HTML tag telling search engines which URL is the primary version of a page.
Core Web Vitals
Google's UX metrics: LCP (loading), INP (interactivity), CLS (stability).
Search Intent
The goal behind a query: informational, commercial, transactional or navigational.
Long-Tail Keyword
Longer, specific phrases with lower volume but higher conversion rates.

Free SEO Tools

Learning Center

  • SEO Fundamentals — a 7-day starter path (coming soon)
  • Technical SEO Deep Dives — crawling, indexing, rendering (coming soon)
  • Read our latest guides on the blog

API Documentation

  • POST /api/seo/domain-overview

    { domain } → authority, spam score, traffic, backlinks, competitors

  • POST /api/seo/keyword-research

    { keyword } → volume, KD, CPC, intent, related + long-tail keywords

  • POST /api/seo/keyword-bulk

    { keywords[] } → metrics for up to 25 keywords in one call

  • POST /api/seo/site-audit

    { url } → multi-page crawl, health score, issues, AI recommendations

  • GET /api/history

    Your full analysis history