SEO (Search Engine Optimization)とは何ですか？

SEO works across three interdependent pillars. On-page SEO covers keyword targeting, content quality, title tags, meta descriptions, header structure, and internal linking — all the elements on your pages that signal relevance to search engines. Technical SEO addresses site speed, mobile-friendliness, crawlability, Core Web Vitals, structured data (schema markup), and HTTPS — the infrastructure that allows search engines to index your content correctly. Off-page SEO (link building) builds your domain authority through earning backlinks from other reputable sites, which acts as a vote of credibility in Google's algorithm.

SEO is a long-term channel. Unlike paid advertising which stops the moment you stop paying, organic rankings compound over time — a well-optimized page can drive traffic for years. Keyword research forms the strategic foundation: identifying what your target customers search for, how competitive those terms are, and which queries indicate intent to buy versus intent to browse. A professional SEO strategy integrates all three pillars against a prioritized roadmap, not a checklist of one-off tactics.

For local businesses and service providers, local SEO adds a fourth dimension — optimizing Google Business Profile, acquiring local citations, and targeting geo-modified keywords to appear in map pack results. This is often the highest-ROI SEO work for businesses with a specific service area.

Over 90% of online experiences begin with a search engine. Ranking on the first page of Google for commercial keywords your customers actually use is one of the most defensible growth channels available — but achieving it requires expertise in technical infrastructure, content strategy, and authority building that most teams don't have in-house. An SEO specialist can audit your current performance, identify your biggest opportunities, fix the technical issues that are silently suppressing your rankings, and build a content strategy that compounds over time.

Without professional SEO guidance, most businesses either ignore the channel entirely (missing a major source of free traffic) or invest in tactics without a coherent strategy — producing content that never ranks or spending on agencies that deliver vanity metrics. The right SEO expert pays for themselves through sustained organic growth.