What Does an SEO Agency Actually Do? The Real Work Behind SEO

An SEO agency audits your site’s technical health, builds content that matches what people search for, earns links from credible sites, and tracks results month after month. Keywords are one small input. Most of the work is invisible: fixing how Google crawls and understands your site, then making your brand trustworthy enough to rank and to be cited by AI tools like ChatGPT, Perplexity and Google’s AI Overviews.

Some clients think SEO means tweaking a few keywords and waiting for traffic. It doesn’t work that way. Here is what actually happens behind the scenes, step by step, and what you should expect to see from whoever is doing it for you.

SEO specialist explaining the real process of search engine optimization

Step 1: The Foundation — Data, Audits, and Competitive Analysis

Before a single optimisation is made, the process begins with discovery. That means a client briefing, access to Google Search Console (GSC) and Google Analytics 4 (GA4), and an audit of where your organic visibility stands today. We map conversion paths, separate the pages that earn clicks from the ones that only earn impressions, and find what your competitors rank for that you don’t.

Every site has its own technical debt, content gaps and authority profile, so this is never a one-size-fits-all checklist. Skipping this step, which many cheap SEO providers do, is why so many campaigns fail to produce lasting results.

For a structured, step-by-step approach to turning audit insights into rankings, see our proven 90-day SEO plan.

Step 2: The Technical Work Nobody Talks About

Technical SEO is where most of the invisible, high-impact work happens. It covers crawl budget, www vs. non-www canonicalisation, trailing slash consistency and HTTPS enforcement. These details decide whether Googlebot can read your site structure correctly and whether it trusts your pages enough to rank them.

Common problems we fix include HTTP/HTTPS internal link mixing, redirect chains, orphaned pages, pagination errors and robots.txt misconfigurations. Each one left alone quietly holds rankings back.

We also audit Core Web Vitals: LCP (loading), INP (responsiveness) and CLS (visual stability). They are a modest ranking signal, but they matter more for conversions, because slow or jumpy pages lose visitors before your content gets a chance. Faster, cleaner pages also help in AI-era search experiences.

Step 3: Content Strategy Built for Humans and AI Engines

Effective SEO content has to satisfy search intent, show E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) as described in Google’s Quality Rater Guidelines, and be structured so AI tools can quote it.

That last part is what separates modern SEO from legacy SEO. Answer Engine Optimization (AEO) means structuring content so systems like Google’s AI Overviews, ChatGPT, Perplexity and Gemini can lift it as a direct answer: clear questions, concise definitions, verifiable sources. Generative Engine Optimization (GEO) focuses on making sure your brand is represented accurately in AI-generated responses. We cover both in depth in our guide on how GEO, AEO, and AIO actually work in the AI era.

Every page we create or update is checked for factual accuracy, source citation, information gain (does it add something competitors don’t?), duplicate content and keyword cannibalization. We also validate structured data (Organization, Article, Breadcrumb, and Product or Review where relevant). FAQ and How-To rich results are now largely retired in Google, so we don’t promise them. Schema is still worth doing for clarity and eligibility where it applies.

If you’re publishing content without a clear strategy, read why you should stop churning out blog posts without strategy.

Step 4: Links, Brand Authority, and the Off-Page Ecosystem

Link building is one of the most misunderstood services in digital marketing. Quality and context matter far more than volume. We judge every opportunity on topical relevance, the quality of the linking site, outbound link ratios, link velocity and spam signals. (Third-party “domain authority” scores are not a Google metric. We use them only as a rough guide.)

Our acquisition approach is digital PR, journalist-request outreach, editorial placements and strategic partnerships. We never use paid link schemes that break Google’s spam policies. We also audit your existing backlink profile for toxic links. The difference between healthy and harmful links is covered in our complete guide to backlinks in SEO.

Internally, we shape your link architecture so PageRank flows to priority pages: fixing orphaned pages and low internal-link URLs, and building topical clusters that signal authority on a subject. Anchor text is a nuanced part of this, explained in our anchor text guide.

Brand authority matters too. We monitor branded search volume, entity consistency across Google Business Profile, LinkedIn and schema, and online reputation. This is especially important for AI answers, where inconsistent entity data tends to get filtered out.

Step 5: SEO in the Age of AI Search — GEO and AEO in Practice

Google’s AI Overviews appear for a growing share of queries, and tools like ChatGPT and Perplexity are increasingly used as search engines. Blue-link rankings still matter, but they are no longer the only place you can be found. To show up, content needs to be citable, authoritative and structured:

  • AEO: Answer questions directly. Use a question, then a concise answer, then supporting detail.
  • GEO: Build brand entity signals, get cited by credible third-party sources and keep structured data consistent.
  • On-page clarity: AI engines favour unambiguous writing. Use plain language wherever it says the same thing more sharply.

More on what works versus what’s marketing noise: the truth behind AIO, GIO and other SEO buzzwords.

Step 6: SEO Is Ongoing, Not a One-Time Project

SEO has no finish line. Google updates its core algorithm several times a year, and its ranking factors have evolved dramatically in just the last 24 months. Ongoing work includes indexing health monitoring, soft 404 resolution, manual action remediation, security issue handling and regular content refreshes.

It also includes stakeholder management and ROI reporting: translating technical metrics into business outcomes that justify continued investment. If you’ve seen SEO budgets cut, read why SEO budgets get cut and how to make yours untouchable.

What You Should Actually Receive From an SEO Agency

If someone is doing this work for you, you should be able to point to it:

  • A written audit in the first month covering technical, content and backlink findings
  • A prioritised roadmap, not a list of 200 issues with no order
  • Monthly reporting tied to leads and revenue, not just rankings and impressions
  • A clear explanation of every link acquired, and where it came from
  • Access to your own Search Console, Analytics and any reports at all times

If your provider can’t show you most of this, you are probably paying for keywords, not SEO. Our guide to hiring an SEO consultant lists what else to check.

The Takeaway

SEO strategy framework showing technical, content, and link building pillars

SEO isn’t about quick fixes. It sits at the intersection of technology, content and human behaviour, and it compounds. When you invest in it, you’re not paying for keywords. You’re building a visibility asset your competitors can’t copy overnight.

Want this done properly? Explore our SEO, AEO & GEO services or hire an SEO consultant.

Frequently Asked Questions About SEO

What does an SEO agency actually do?

An SEO agency audits your site’s technical health, builds content around search intent and E-E-A-T, earns quality backlinks, improves internal linking and structured data, and monitors performance over time. In 2026 that also includes Answer Engine Optimization (AEO) and Generative Engine Optimization (GEO), so your brand shows up in ChatGPT, Gemini, Perplexity and Google’s AI Overviews.

How long does SEO take to show results?

Typically 3 to 6 months for meaningful ranking gains on competitive keywords. Less competitive terms can move faster. Results compound over time, and holding rankings takes continuous optimisation, content updates and technical monitoring.

What is the difference between AEO and GEO?

AEO structures content so AI tools can extract it as a direct answer. GEO makes sure your brand and content are cited accurately in AI-generated responses, by building entity consistency, earning authoritative citations and publishing trustworthy content.

What is E-E-A-T and why does it matter for SEO?

E-E-A-T stands for Experience, Expertise, Authoritativeness and Trustworthiness. It’s the framework Google’s quality raters use to judge content. Content that shows real-world experience, cites credible sources and comes from a verifiable author or brand is more likely to rank and to be cited in AI answers.

What are Core Web Vitals and do they affect rankings?

Core Web Vitals measure user experience: LCP (loading speed), INP (responsiveness) and CLS (visual stability). They are a modest ranking signal, but poor scores hurt conversions and can hold back pages in competitive niches.