An SEO agency does four kinds of work: technical fixes that let search engines crawl and index your site, on-page and content work that makes pages relevant to what buyers search, off-page work that builds authority through earned links, and strategy plus measurement that ties all of it to revenue. The mix shifts by site and goal, but a legitimate program covers all four and writes the scope down so you know what you are paying for.
1. Technical work
Technical SEO makes sure search engines can crawl, render, and index your site without friction. That means fixing broken links and redirect chains, improving site speed and Core Web Vitals, resolving duplicate pages, structuring the site so important pages sit within three clicks of the homepage, and adding schema markup so search engines understand what each page is.
This is the foundation, and it usually comes first for a reason. Content and links on a technically broken site rank slowly, if at all. SEO audit services are where this work starts, and our technical SEO checklist covers the items that move the needle most. Expect the audit in month one and a prioritized fix list that the agency works through over the following weeks, re-crawling as it goes.
2. On-page and content work
On-page SEO makes individual pages relevant to what people actually search. That includes keyword research to find the terms your buyers use, writing and optimizing titles, headings, and copy, building content that answers real questions, and structuring pages so they are easy to read and act on.
Content is usually the largest ongoing part of a program, because ranking for more terms means owning more pages worth ranking. A good agency plans content around commercial intent, not traffic for its own sake. A page targeting a term with buying intent, even at 300 searches a month, is often worth more than a viral piece with 30,000 visits and no path to purchase. Expect a content calendar, drafts for your review, and a steady publishing cadence of four to eight pages a month on an active program. Our search engine optimization company team builds that calendar around the terms most likely to produce pipeline.
3. Off-page work and links
Off-page SEO builds your site's authority, mostly through links from other reputable sites. Earning those links takes real work: creating content worth citing, digital PR, and direct outreach to publishers and partners. Quality matters far more than quantity. Ten links from trusted, relevant sites do more than a thousand from link farms, and the shortcuts carry real penalty risk.
We cover the safe approach in how to get backlinks and the risks of the shortcut in should you buy backlinks?. A good agency reports the links it earns each month, names the domains, and never pads the number with directory spam or paid link networks that can trigger a manual action.
4. Strategy, measurement, and reporting
The work above only pays off if it points at the right goals and gets measured honestly. A good agency sets a strategy tied to revenue, prioritizes the terms and pages most likely to drive business, tracks rankings, traffic, and conversions, and reports in a way that connects effort to pipeline rather than vanity numbers.
Expect a monthly report that shows organic sessions, conversions, and revenue or leads by landing page, plus the work completed and the plan for the next month. The method for tying that report back to money is covered in SEO ROI. If the reporting only shows rankings and traffic with no line connecting to money, the agency is measuring the wrong things.
How the work is usually structured
Most agencies deliver this as a monthly retainer with a defined scope. A typical mid-market program might include a set number of content pieces, ongoing technical fixes, a link-earning target, and monthly reporting, all for a fixed fee. Some work is front-loaded (the audit and the first wave of fixes), and some is steady (content and links), so the deliverables shift across the engagement.
You should know who does the work. On a good account, senior strategists set direction and handle the judgment calls, while specialists execute content, technical fixes, and outreach. You should never pay senior rates for junior work hidden behind an account manager who only forwards reports.
How the four areas work together
The four areas are not independent projects, they reinforce each other. Technical work clears the path so content can rank. Content gives you pages worth linking to, which makes the off-page work easier. Links raise the authority that helps every page rank, including the next batch of content. Measurement points the whole system at the pages and terms that produce revenue, so effort compounds instead of scattering.
Skip one area and the others underperform. Great content on a slow, poorly structured site ranks below its potential. A technically flawless site with thin content has nothing to rank. Strong content and clean technicals with no links struggle to pass established competitors. This is why a legitimate agency staffs all four and sequences them deliberately: foundation first, then content and links in parallel, with measurement running throughout to catch what is working and cut what is not.
The sequencing also explains why results build rather than arrive all at once. The first two months look quiet because the foundational work has not surfaced yet. By month four, the content and links from earlier start ranking, and the compounding becomes visible in the traffic and conversion numbers.
What a good agency does not do
Just as telling as the work list is what a good agency avoids. It does not guarantee specific rankings, because no one controls the algorithm. It does not buy spammy links or use tactics that risk a penalty. It does not hide the work behind jargon or bury junior staff behind an account manager. And it does not report on metrics that look good but do not tie to revenue.
It also does not lock you into a long contract with no accountability, and it does not hold your content, analytics, or accounts hostage. You should own all of it. If you want to separate real agencies from the rest, the guide to choosing an SEO company gives you the exact questions to ask and the answers to listen for.
How to read a proposal
Line the proposal up against the four areas above. If technical, content, links, and measurement all appear with specific deliverables and quantities, the scope is real. If it reads as a flat monthly fee for unspecified optimization, it is padding. Ask what gets delivered in the first 90 days, who does it, and how success is measured. Specific answers signal a real program.
If you want a team to run all four areas with the scope in writing and reporting tied to revenue, request a proposal and we will show you exactly what a program for your site would include.
Frequently Asked Questions
What does an SEO agency actually deliver each month?
A legitimate program delivers across four areas: technical fixes, new and optimized content, earned links, and a report tying it all to revenue. On a typical mid-market retainer that means four to eight content pieces, ongoing technical work, a link-earning target, and a monthly report showing organic sessions, conversions, and revenue by landing page, plus the plan for next month.
Is SEO a one-time project or ongoing?
Mostly ongoing. Some work is front-loaded, like the initial technical audit and the first wave of fixes, and can look like a project. But rankings require continuous content, link earning, and maintenance because competitors keep publishing and algorithms keep shifting. Stop the work and rankings erode over six to twelve months, so most agencies operate as a monthly retainer.
How much of SEO is content versus technical?
It varies by site condition. A technically broken site needs heavy foundational work up front, so the first two to three months skew technical. Once the foundation is clean, content becomes the largest ongoing effort because ranking for more terms means owning more quality pages. Link earning runs in parallel throughout. Measurement and strategy tie the mix together.
Can I do SEO in-house instead of hiring an agency?
Yes, if you can staff all four areas. Technical SEO, content production, link earning, and measurement each require different skills, and covering them internally usually means at least two or three specialists plus tooling. Many companies hire an agency for the range of expertise and pace, then bring pieces in-house as the program matures and their team grows.
What should an SEO agency never promise?
It should never guarantee specific rankings, because no one controls the algorithm. It should never rely on bought or spammy links that risk a penalty, hide the work behind jargon, or report only on vanity metrics with no line to revenue. It should also never lock away your content, analytics, or accounts. You own those.
Part of our search engine optimization company work.