SEO Case Studies: Patterns That Repeat Across Campaigns

Case studies are SEO's most abused genre — cherry-picked wins, invisible timeframes, correlation sold as causation — and also its most valuable, when read correctly: across enough campaigns, the same patterns repeat with the reliability of physics, and those repeating patterns are worth more than any single result. This hub distils what recurs across the campaigns we've run and observed — client work, our own network of publications, and documented experiments — and anchors a 24-piece series where each pattern gets its own writeup with numbers. Names are anonymised throughout; the patterns are the product.

How to read any case study (including ours)

Four questions before believing anything: What was the baseline? (a 40% lift on 100 visits is noise; on 100,000 it's a business) What else changed? (the refresh credited for a jump that coincided with a core update — half the genre's false lessons live here) What's the timeframe? (wins measured in days are usually wobble; the honest unit is months) Would it survive repetition? — one result is an anecdote; the same result across campaigns is a pattern. Our series marks each piece accordingly: what we're confident generalises, and what was probably situational.

The patterns that repeat (the short course)

1. Links move rankings on a lag — consistently weeks-to-months, never days (the timing study), which is why impatient campaigns misread their own results.
2. Concentration beats scatter — the topical authority and zero-to-10k writeups show the same curve: complete clusters outperform equal effort spread thin, every time we've measured it.
3. The page-two layer is the cheapest traffic in SEO — refreshes, internal links and title rewrites on near-miss pages produce the fastest verified wins in the whole series.
4. Authority explains most "mysteries" — why weak-looking sites outrank strong ones (page-level relevance and links beating domain-level metrics) and why clean sites stall (the gap math nobody ran).
5. Process beats heroics in outreach — the guest posting, HARO and broken-link campaigns all converged on the same shape: modest hit rates, sustained cadence, compounding relationships.
6. Fixes work when the diagnosis was right — cannibalization merges and penalty recoveries deliver dramatic befores-and-afters precisely because the problem was specific; the same interventions on misdiagnosed sites do nothing.

The series

Link building campaigns: 100 backlinks in 30 days, realistically · broken link building · three months of HARO · 40 pitches, 9 placements · skyscraper · exact-match anchors at scale.

Experiments: internal linking · title tags and CTR · nofollow value · redirect equity · link timing · when doubling frequency backfired.

Recoveries and fixes: penalty recovery · cannibalization · content refresh · migration · the DA mystery.

Growth stories by model: zero to 10,000 visitors · topical authority · local · ecommerce · SaaS · affiliate · programmatic SEO's two endings.

Frequently asked questions

Why anonymise? Doesn't that make case studies unverifiable?

Client confidentiality is non-negotiable in agency work, and competitor intelligence is real — the trade every honest agency makes is anonymity for specificity of method: exact processes, real timelines, directional numbers, and patterns you can test yourself. Distrust any case study on those terms? Correct instinct — test the pattern on your own site; that's what they're for.

Which case study should I read first?

Whichever matches your current bottleneck: stalled rankings → the DA mystery and timing study; flat traffic → zero-to-10k; outreach fatigue → the pitch-math writeups. The patterns interlock; start where it hurts.

Can you run these playbooks for my site?

The campaign patterns in this series — especially the link-led ones — are literally the operating procedures behind our publisher network's client work: same methods, your numbers (start the conversation).