The plain answer
What is SEO for digital marketing agencies?
For a digital marketing agency, SEO fulfilment is the production side of what you already sell: research, drafting, editing, publishing, and reporting on content for every client on retainer. theStacc is the production layer — a separate workspace per client, a 30-day plan generated from that client’s services, articles scored 0–100 before they publish, and weekly rank tracking with history. You keep the strategy, the client relationship, and the margin.
The maths is the argument. A competent freelance SEO writer runs $150–$400 an article, so eight articles a month is $1,200–$3,200 of fulfilment cost against a retainer you probably priced at $2,500. Blog SEO is $99 a month per project, or $167 with Local SEO and Social attached. That is the difference between fulfilment being your biggest line item and fulfilment being a rounding error.
Where it happens
Two surfaces, not one. The map — your Google Business Profile, which decides whether you appear in the local pack — and the blue links, where your website pages answer the questions people type before they buy.
Why it compounds
Google rewards pages that have been live and useful for months, and listings that stay active. That is why cadence beats intensity: publishing steadily for a year outperforms a burst of work every quarter.