Search engine optimization, or SEO, is the work of making a website appear in search engines for the searches your customers actually make. This guide covers the whole picture: how search works, what SEO consists of and the order in which the work is best done.
What is search engine optimization?
Search engine optimization (SEO) means improving a website’s technology, content and trustworthiness so that a search engine can find the pages, understand them and show them to the right people. The aim is not traffic for its own sake but that the right customer finds the right page and gets in touch.
SEO differs from advertising in that you do not pay for clicks. In exchange, results come more slowly and have to be earned with content that answers the search better than a competitor’s page does.
How a search engine works
A search engine does three things, and each of them can go wrong:
- It crawls pages. A crawler follows links and the sitemap. A page with no link pointing to it, or one blocked in robots.txt, is not found.
- It indexes pages. The search engine decides whether to store the page in its index. A duplicate or thin page may be left out.
- It ranks results. For every search it judges which page best serves what the searcher is trying to do.
This is why the work always begins by checking whether the important pages appear in search at all. We cover the technical basics in the technical SEO guide.
The three parts of SEO
- Technology. Pages are readable by search engines, fast and work on a phone. See the technical SEO guide and the Core Web Vitals guide.
- Content. Every important search has one page that answers the question properly. See the content strategy guide and the internal linking guide.
- Trust. The website says who is speaking and with what experience, and other websites refer to it. This covers author details, references and links from other sites.
The parts are not alternatives. Good content does not help if the page is not indexed, and flawless technology does not help if the page answers no search.
Start with the goal, not the keywords
First write one sentence: which service do you want to sell more of, and to whom? Without it the keyword list balloons and nobody knows what in it matters.
Decide at the same time what counts as a valuable enquiry. A quote request, a booking and a newsletter sign-up are different things, and the plan is built around the most important one.
Find out what your customers search for
Collect searches from three places: Search Console, the questions your sales team hears, and the search results themselves. For each search, look at what Google shows. If the results are guides, a service page will not rank there.
Group the searches by intent: is the person looking for a provider, comparing options or learning the subject?
Give every search one page
Go through your existing pages and note which search each one answers. The most common finding is two pages competing for the same search, and an important search with no page at all.
Decide for each page: keep, expand, merge with another or remove. The content plan guide helps at this stage.
Make sure the important pages can be found
Check in Search Console that your most important pages are indexed. If a page is missing, no amount of content work helps until the cause is fixed. The indexing checklist goes through the causes.
Put the work in order
Judge every task with two questions: how much effect does it have, and how much work does it take? Start with what has a large effect and is quick to do.
- First: barriers that keep pages out of search.
- Then: the content and headings of the most important service pages.
- After that: new pages for missing searches, and internal links.
- Continuously: tracking and updates.
How long does SEO take?
The fair answer is that it depends on the starting point and the competition. Fixing a technical barrier can show within weeks. The effect of new content typically shows over months, because the search engine first has to find the page, index it and gather information on how searchers respond to it.
That is why we agree the baseline and the measures before work begins and follow the direction month by month. The SEO pricing guide explains what the amount of work depends on.
Agree how results are followed
Record the starting point: clicks, impressions and enquiries for the most important pages. Look at the numbers once a month, not every day. A single week tells you nothing; a three-month trend does.
Below is an example of why it is not worth staring at a single month. Christmas and the July holiday season show in the line, but the overall direction is clearly upward.
An example: monthly clicks from Google Search, August 2025 – October 2026. Seasonality is part of search traffic for many companies.
If you would like us to make the plan with you, it is part of search engine optimization and the SEO audit.
The most common mistakes
- The same search is given to several pages, which then compete with each other.
- A service page talks about the company but does not answer the customer’s question.
- Addresses change in a redesign without redirects. See the website migration SEO guide.
- Results are measured by rankings alone although the goal is enquiries. See the conversion tracking guide.
- Work stops when the first results show, and the content goes out of date.
SEO and AI
More and more people put the same question to AI instead of a search engine. AI gets its information largely from the same pages as a search engine, so good SEO is also the foundation of AI visibility. We cover the differences and the extra work in the generative engine optimization (GEO) guide.
All guides by topic
- Foundations: search engine optimization (SEO), technical SEO, SEO audits and WordPress SEO.
- Content: content strategy, internal linking, local SEO and multilingual SEO.
- Technical topics: indexing, Core Web Vitals, schema markup and website migrations.
- AI: generative engine optimization (GEO), measuring AI search visibility and AI in marketing.
- Results: conversion rate optimization (CRO), conversion tracking and SEO pricing.