If you have been quoted for SEO and come away unsure what you are actually buying, you are not alone. The work is largely invisible, most proposals describe deliverables rather than outcomes, and the industry has a long history of charging for activity that never had a chance of moving anything.
This is a plain description of what the work involves, what should appear in your inbox each month, and what to be wary of.
What does an SEO agency do?
An SEO agency improves how well a website ranks in search results. In practice that means four kinds of work: research into what buyers search for, technical fixes so search engines can crawl and understand the site, content that answers those searches, and earning links and mentions that establish the site as credible.
Everything else an agency does is a variation on those four. The proportions differ enormously depending on what is actually holding a site back, which is why a good agency starts by diagnosing rather than by selling a package.
The four kinds of work, explained
1. Research: deciding what to target
Before anything is written or fixed, someone has to work out which searches are worth ranking for. That is less obvious than it sounds. The highest-volume terms in most industries are also the most contested and often the least commercial, while the searches that actually produce enquiries are narrower and carry unimpressive volume in any keyword tool.
Good research also covers what competitors rank for that you do not, which of your pages already rank on page two and could be pushed up, and what your buyers ask before they are ready to buy.
2. Technical: removing what blocks ranking
Search engines have to crawl a site, understand its structure, and render its pages. Plenty of sites quietly prevent this, and no amount of content fixes a site that cannot be crawled properly.
- Pages accidentally blocked by robots.txt or a stray noindex tag
- Slow loading, particularly on mobile, where most people actually are
- Duplicate versions of the same page competing with each other
- Broken internal links and redirect chains that waste crawl budget
- Missing or invalid structured data
- Site structure so flat or so deep that important pages are hard to reach
Technical work is unglamorous and it is frequently where the fastest gains sit, particularly on older sites that have been redesigned once or twice.
3. Content: answering the searches
Once you know what to target, something has to exist that deserves to rank for it. That might mean new pages, but on established sites it more often means improving what is already there: pages that cover a topic partially, or three thin pages that should be one strong one.
Content work also covers the structural side, how pages link to each other, whether the site has an obvious hierarchy, and whether the pages that make you money have enough internal support to rank.
4. Authority: earning links and mentions
Search engines treat links from other sites as evidence that yours is worth showing. Earning them is the slowest and least predictable part of SEO, and it is where the industry’s worst practices live. Buying links from networks works until it does not, and the recovery is expensive.
Legitimate approaches are slower: original research worth citing, genuine relationships, digital PR, and being listed where your industry is actually listed.
What you should receive each month
The deliverables vary, but the shape of a decent month is consistent enough to judge against.
| You should get | Why it matters |
|---|---|
| A record of what was done | Specific changes, not “ongoing optimisation” |
| What changed as a result | Rankings, traffic, and enquiries, not just impressions |
| What is planned next, and why | Shows there is a strategy rather than a routine |
| Access to everything | Analytics, Search Console, and any accounts, in your name |
| An honest note on what did not work | Every month has some. Reports that never mention it are selective |
Red flags worth catching early
Most of these are visible in the first conversation, before any money changes hands.
- Guaranteed rankings. Nobody controls Google’s results. A guarantee is either meaningless small print or a promise to rank you for terms nobody searches.
- Reports that only show impressions. Impressions rise on their own. Enquiries are the number that pays your salary.
- Accounts held in the agency’s name. If leaving means losing your analytics history and ad accounts, you are not a client, you are a hostage.
- A fixed monthly number of blog posts as the entire strategy. Volume is not a strategy, and content nobody searches for cannot rank.
- No questions about your business. An agency that quotes before understanding what a customer is worth to you is selling a package, not a plan.
- Vagueness about links. Ask directly how links are earned. Discomfort with the question usually means the answer is that they are bought.
Agency, consultant, or in-house?
All three work in the right circumstances, and the honest answer depends on your situation rather than on which one an agency happens to sell.
| Option | Works when | Falls down when |
|---|---|---|
| Agency | You need several skills but not full-time | Nobody internally owns the relationship |
| Consultant | You have capacity but not expertise | Nobody is free to implement the advice |
| In-house | You publish constantly, year-round | One person has to cover every discipline |
| Nothing yet | Product-market fit is still unproven | Competitors are compounding while you wait |
How to sanity-check an agency you already have
If you are already paying and are unsure whether it is working, four questions will tell you most of what you need to know.
- Which pages produced enquiries in the last ninety days? A capable agency answers this from data. A weak one changes the subject to rankings.
- What did we stop doing because it was not working? If the answer is nothing, nobody is reviewing the plan.
- Show me the last three links we earned. Real links can be shown. Bought ones usually cannot.
- If we left tomorrow, what would we keep? The answer should be everything.
The short version
An SEO agency researches what your buyers search for, fixes what stops your site ranking, produces content that answers those searches, and earns the authority to compete. Done properly it is slow, measurable, and honest about its limits. Done badly it is a monthly invoice for activity that was never going to move anything, which is why the questions above matter more than the proposal does.