What is SEO?
Search Engine Optimization (SEO) is the practice of shaping a website so search engines can discover, understand, and rank it. Strong SEO grows qualified, compounding organic traffic — the highest-margin channel in modern marketing.
SEO combines three disciplines: content that matches searcher intent, technical health that lets crawlers do their job, and off-site authority signals like backlinks.
How search engines work
Search engines run three loops:
- Crawling: bots follow links to discover URLs.
- Indexing: pages are parsed, deduped, and stored with entities and topics.
- Ranking: for each query, the engine scores candidate pages on relevance, authority, and user-signals.
Keyword research fundamentals
Every ranking opportunity starts with a query. Group keywords by intent:
- Informational: 'what is topical authority'
- Navigational: 'eternity login'
- Commercial: 'best AI marketing platform'
- Transactional: 'buy content automation'
Prioritize keywords where volume, difficulty, and business value intersect.
On-page optimization
On-page SEO tells engines what a page is about.
Title tags One per page, 50-60 chars, primary keyword near the front.
Meta descriptions Under 155 chars, action-oriented — descriptions influence CTR, not rank.
Heading structure Exactly one H1. Nest H2 > H3 > H4 semantically; never skip levels for styling.
Internal linking Link related pages with descriptive anchor text to distribute authority and reveal topical relationships.
Technical SEO
Technical SEO removes friction between crawlers and content.
- Page speed & Core Web Vitals (LCP < 2.5s, INP < 200ms, CLS < 0.1).
- Mobile-first rendering — Google indexes the mobile view.
- Clean sitemaps and robots.txt.
- Canonical tags to consolidate duplicates.
- Structured data (schema) for entity clarity.
Link building and backlinks
Backlinks remain a top ranking signal. Focus on quality over quantity:
- Digital PR and original research.
- Guest posts on authoritative, on-topic sites.
- Broken link building and unlinked mentions.
Avoid link farms, PBNs, and paid do-follow links — Google penalizes them.
Measuring SEO performance
Track impressions, clicks, position, and CTR in Google Search Console. Complement with rank tracking, referring domains, and business KPIs like leads and revenue by landing page.
Key terms
- SERP
- Search engine results page — everything shown for a query.
- Crawling
- How bots discover URLs by following links.
- Indexing
- Storing and organizing pages for retrieval.
- Ranking
- The ordered position a page holds for a query.
- Keyword intent
- The goal behind a search: learn, navigate, compare, or buy.
- Anchor text
- The visible clickable text of a hyperlink.
- DA / PA
- Third-party domain and page authority scores estimating ranking strength.
- CTR
- Click-through rate: clicks divided by impressions.
- Bounce rate
- Share of sessions with a single interaction before exit.
Put this into practice, automatically
Eternity's Blog Generator produces SEO-ready articles with H1-H5 hierarchy, target-keyword scoring, and a technical audit module that flags crawl, speed, and schema issues.
Open Content Studio