SEO Agency

An SEO agency supports businesses in their organic search strategy to improve their visibility on Google and other search engines. Services typically cover: technical SEO audit, content strategy, link building, international SEO, redesign support, on-page optimisation and GEO (Generative Engine Optimisation). Agencies work across all CMS platforms: WordPress, Shopify, Magento, PrestaShop or custom solutions. The highest-performing approach is business-oriented: every SEO action should generate qualified traffic and revenue, not just rankings. 

The cost of an SEO service varies depending on the size of the site, the competitiveness of the sector and the objectives being targeted. For an SME, expect to budget generally between £1,500 and £5,000 per month for comprehensive SEO support (technical, content, link building). For a large business or high-volume e-commerce site, budgets typically sit between £5,000 and £15,000 per month, or more depending on complexity (international, redesign, advanced technical SEO). Some agencies offer partial performance-based billing to align their interests with those of the client. 

In 2026, Google prioritises three pillars: content quality (which genuinely answers search intent), user experience (Core Web Vitals, mobile-first, loading speed) and site authority (link profile, E-E-A-T signals). Structured data (schema.org) is growing in importance for appearing in rich results and generative engines (ChatGPT, Perplexity). Technical SEO remains the foundation: without clean crawlability and controlled indexation, no strategy can succeed. Alignment with GEO is becoming a differentiating factor for brands that want to remain visible in the new ways people search. 

SEO is a medium-term investment. On less competitive queries, you may reach page one within 3 to 6 months. On strategic, competitive keywords, allow 6 to 12 months, or longer depending on your starting point and sector. The first results (positions gained, rising traffic) typically appear within the first 2 to 3 months, but consolidation in the top 3 takes time and consistency. Reputable agencies identify quick wins during the audit that generate early results, whilst building a long-term strategy to dominate high-value queries. 

On-page SEO covers all optimisations directly on your pages: title tags, meta descriptions, heading structure, internal linking, content quality and semantic optimisation. Off-page SEO refers to everything that happens outside your site, primarily link building (quality backlinks) and authority signals. Technical SEO covers the infrastructure: crawlability, indexation, loading speed, site architecture, structured data, robots.txt, sitemap. These three dimensions are complementary: a technically sound site with mediocre content will not rank, and excellent content on a slow, poorly crawled site will not either. A high-performing SEO strategy manages all three simultaneously. 

First, check that the agency has expertise across the three SEO pillars (technical, content, link building) and that it has relevant references in your sector. Ask for client case studies with measurable results (traffic, rankings, organic revenue), not just promises. Make sure the agency is data-driven and gives you real-time access to your performance. Be wary of agencies that guarantee the top spot on Google within a few weeks: serious SEO takes time. An audit will generally help you identify where the biggest gains are and get a concrete sense of how the agency works before making any commitment. 

Yes, provided the SEO migration is planned and secured in advance. A poorly managed redesign can result in a 30 to 50% loss of organic traffic in a matter of weeks. Robust support includes: pre-redesign audit, complete URL mapping, 301 redirect plan, internal link preservation, migration of high-performing content, post-launch monitoring. The goal is twofold: preserve your existing traffic and use the redesign as an opportunity to address the SEO weaknesses of the old site. A well-managed redesign can even become a driver of organic growth.