Using Google Ads to build backlinks: a $1,245 PPC experiment

Executive overview

Most link building relies on outreach or content discovery. This experiment tests whether paying for ad visibility on search queries with link intent can passively generate backlinks.

Two campaigns ran against the same keyword set. The first used proprietary data (original research); the second used a curated stats list targeting search intent. Results diverged significantly.

Being the original data source is the single biggest driver of link conversion from ads.

Validating the idea before spending

• The "Vicious Circle of SEO": top-ranked pages attract links because they rank first, not necessarily because they're best
• Hypothesis: paying for top ad placement on link-intent queries could replicate that passive linking behaviour
• Proof-of-concept method: search for stats pages running ads, extract GCLID footprint from URLs, check backlinks in Ahrefs Site Explorer
• Harvard Business Review's ad-driven pages had 142 backlinks containing the GCLID parameter
• Key caveat: most linkers strip tracking URLs before linking, so GCLID links undercount total ad-attributed links

Campaign 1 — original data study

• Ran a noindexed duplicate of an existing Ahrefs data study; page invisible to search, visible only via ad
• Keywords: phrase-match queries like "digital marketing statistics", "SEO facts"
• Duration: week of Feb 24 – week of Mar 30, 2020
• 447 clicks, 7.05% CTR, avg CPC ~SGD 1.69, total spend ~$541 USD
• 13 backlinks from unique domains; 2 were scrapers, leaving 11 true referring domains
• Cost per referring domain: ~$49; cost per domain with 100+ monthly organic visits: ~$77
• Best link: WP Astra (DR 91); 5 of 13 domains had DR 50+
• Link acquisition lag: 2.5 weeks to 3 months after campaign start

Campaign 2 — curated SEO stats page

• Used the strategically built SEO stats page from parts 1 and 2 of the series
• Same keyword targeting, same campaign structure
• Duration: week of Apr 13 – week of May 11
• 1,217 clicks (2.7x more), 10.31% CTR, avg CPC ~SGD 0.81 (less than half campaign 1), total spend ~$705 USD
• Only 9 referring domains; 4 considered decent links
• Cost per decent link: ~$176 — 2.3x worse than campaign 1 despite better click metrics

Why campaign 2 underperformed

• Curated stats pages link to original sources; visitors linked to those sources instead of to Ahrefs
• Campaign 1 used Ahrefs' own data, making Ahrefs the source — no competing link target
• Variance: link building from ads involves randomness; campaign 2 may have drawn fewer link-intent visitors

When to use PPC for link building

• Only viable for pages with genuine link intent: stats, data studies, original research
• Being the data source, not an aggregator, is critical for link conversion
• Passive and fully compliant with Google's webmaster guidelines
• Not a replacement for outreach — combined with email campaigns, total referring domains reached ~43
• Measure beyond links: ad spend also drives newsletter signups, brand awareness, and potential customer acquisition
• Expect a 2.5-week to 3-month delay before links appear after a campaign ends