You can do much of SEO yourself. The part you cannot do alone is seeing what your market has not been told yet.

Largely, yes. Google's own guidance says: “If you run a small local business, you can probably do much of the work yourself.” The technical floor is documented openly in Google Search Essentials and measurable in Search Console.

A crawlable, fast, mobile-friendly site served over HTTPS, clear titles and descriptions, accurate structured data, and pages that answer your customers' questions in your field's real vocabulary. None of it is secret. All of it takes care and time.

No. Google states plainly: “No one can guarantee a #1 ranking on Google.” An offer that promises one is a reason to walk away.

Google suggests asking for examples of previous work, whether they follow Google Search Essentials, what results they expect and in what timeframe, how they measure success, what experience they have in your industry and country, and whether they will share every change and the reasoning behind it. The answers show whether you are buying craft or promises.

Because it lands you in the SERP consensus, where every serious competitor already restates the same core. W. Chan Kim and Renée Mauborgne found in 108 companies that line extensions made up 86 % of launches and earned 39 % of profits, while the 14 % that created new market space earned 61 %. The same logic holds for content.

Who your customers are, what brings them to you, and what they worry about before they search. An agency that opens with a keyword tool starts from the search intent. One that opens with your customers starts from the user intent, which is where the difference is made.

In seeing what the whole market has not written yet: the questions and subjects your customers care about that no first result page answers. That view cannot come from inside the consensus. It needs methods and experience that a single site owner rarely has.

AI Overviews reached more than 2 billion monthly users by July 2025, and when a summary appears, people click a traditional result far less often. Being cited in an answer now counts alongside being ranked. Whoever helps you should know both disciplines.

There is no fixed answer, which is why Google lists the expected timeframe among the questions to ask any SEO before hiring. Crowded subjects take longer than subjects nobody competes for. A clear timeframe with a stated measure of success is part of a serious offer.

You need an agency when you want more than the consensus and lack the time or methods to find it. You do not need one to follow published guidelines. Johannes Faupel works on the part beyond the consensus together with a small number of partners.