Ten data-backed on-page SEO techniques to boost Google rankings

Executive overview

Most on-page SEO advice is untested opinion. Ahrefs studied 2 million keyword searches to find which factors actually correlate with top rankings.

Individual factors show weak correlations in isolation. Cumulative implementation across all ten techniques produces measurable ranking gains.

The core insight: fulfilling searcher intent outweighs any single on-page optimisation.

URL and keyword placement

• Keep URLs short — median ~17 characters correlated with visibly better rankings.
• Don't restructure existing ranking pages just to shorten URLs; correlation is small.
• Include the primary keyword in the URL for referral traffic and naked-link anchor text benefits, not as a ranking signal.
• Only ~15% of top-10 pages have the exact keyword in their H1 — still use keywords in headings to aid scanning.
• Users read at most 20–28% of page content; keyword phrases in subheadings trigger continued reading.

External and internal links

• Linking to authoritative external sources (DR 70+) showed a small positive ranking correlation in Ahrefs' study.
• Reboot Online's controlled experiment confirmed sites with external links outranked those without.
• Link out only where it enhances the reader's experience, not for its own sake.
• Find internal link opportunities by identifying pages stuck on page two (positions 11–15) in Google Search Console or Ahrefs Site Explorer.
• Search site:yourdomain.com "target phrase" in Google to locate pages where you can insert internal links.

Title optimisation and CTR

• Re-optimise titles on page-one pages with below-benchmark CTRs: position 1 ≈ 33%, position 2 ≈ 15%, position 3 ≈ 10%.
• Study top-ranking organic results to infer searcher intent (e.g. list posts, price inclusion).
• Mine competitor ad copy via Ahrefs Site Explorer > Ads to find proven click drivers.
• Use modifiers — "best", "top", "buy", current year — to capture long-tail variants with real search volume.
• Use Keywords Explorer phrase-match report filtered by modifier terms to find low-difficulty targets.

Content depth and coverage

• Content length had the second-highest correlation of all on-page factors studied.
• The median word count for a number-one result was 800 words — not 1,500–5,000.
• Focus on coverage, not word count: address all subtopics a searcher would expect.
• Find subtopics by scanning subheadings of top-ranking pages; use Ahrefs' organic keywords report on competitor URLs to identify additional ranking terms.

Page speed

• Google confirmed page speed as a ranking signal in 2010; mobile page speed became a factor in July 2018.
• Correlation with rankings is small, but bounce rate impact is large: load time 1→3 seconds increases bounce probability by 32%.
• Actionable steps:
  1. Run Google PageSpeed Insights and download optimised assets.
  2. Use a CDN to reduce geographic latency.
  3. Compress images with a tool like ShortPixel.
  4. Enable caching (e.g. W3 Total Cache for WordPress).

UX and user interface

• Google rewards pages that best fulfil user needs; UI quality directly affects user behaviour signals.
• Improve visual readability: readable font size, short sentences, short paragraphs.
• Use standout images that connect immediately with the reader's goal.
• Add checklists, pro tips, and visual examples to make content hyper-scannable.
• Include a table of contents for long posts; consider a sticky/scrolling version.
• Interactive features — slide decks, videos, polls, tools — increase engagement over time.