Is it possible to do SEO on my own?

The job breaks into four kinds of work, and only the last one depends on anybody else.

Finding what is wrong. Broken links, pages that tell search engines not to index them, missing or duplicated titles, redirect chains, pages nothing links to. This is the slow part by hand and the fast part with a crawler: a scan here reads up to 5,000 pages and lists every fault with the URL it is on.

Deciding what you are competing for. Which searches each page should win. Search Console shows the queries you already appear for, which is a better starting point than any keyword tool, because those are the ones you are close to.

Fixing pages. Rewriting titles and opening paragraphs, merging pages that compete with each other, adding links from your strong pages to the ones you want found. This happens in whatever you already use to edit the site.

Earning links. Being worth citing, then telling the people who would cite you. It is the slowest part and the only one you cannot finish in an afternoon.

The DIY SEO guide goes through all four in the order that pays off.

The first pass is an afternoon: a scan, a look at what it found, and the faults that are plainly mistakes fixed the same day. After that, an hour or two a week is enough for most small sites: one or two pages improved, a re-scan after anything structural, and a look at Search Console once a month.

Results take longer than the work. A technical fix such as a page that was accidentally excluded from the index can show within days of the next crawl; a rewritten title takes a few weeks to settle; anything that depends on links takes months. Judge the effort over a quarter.

You do not need to write code, understand ranking algorithms, or follow every update. You need to know what a title tag, a meta description, a redirect and a canonical are, which takes an evening, and you need to know your own customers, which you already do and an agency does not.

That last point is the real advantage of doing it yourself. Most SEO advice comes down to “say clearly what the page is for, in the words your customers use”, and the owner is the person best placed to know those words.

Hire a specialist, or at least pay for an hour of one, when:

• You are moving domains or platforms. A migration done carelessly loses years of rankings in a week. Every old address needs a redirect, and checking that takes experience.
• The site is very large. Tens of thousands of pages, faceted navigation, or pages generated from a database turn SEO into an engineering problem.
• The content only appears after JavaScript runs. Whether search engines see it is worth an expert's look. A scan here reads the HTML your server sends, without running scripts, so a page that comes back nearly empty tells you that you have this problem.
• Traffic fell off a cliff. A sudden drop has a cause, often a manual action, a migration or a blocked section, and finding it fast is worth paying for.
• You are competing nationally for short, expensive terms. That is a sustained content and links campaign, not a weekend job.
• Your hours are worth more than the fee. A legitimate reason, and one only you can judge.

Take a baseline before you change anything: a scan of the site and a note of the clicks and impressions Search Console reports for the last three months. Re-scan after each round of changes. A free account here keeps your scans together and compares each one with the last, so you can see faults disappear, and Search Console tells you whether anybody noticed.