What does SEO involve, and why can’t it be judged by a single factor?

The main areas of SEO can be grouped into keywords and search intent, content and on-page optimization, technical performance and user experience, external links, and performance analysis. A single factor is not enough because whether search engines can access a website, whether its content meets users’ needs, and whether visitors complete the intended goals are different questions. Rankings, traffic, and link scores cannot individually represent overall performance.

Keywords and content: search volume does not equal relevant demand

Choosing keywords is not just about finding terms with high search volumes. It also means considering how difficult they are to compete for and whether the information searchers want matches the page. Semrush’s article on keyword research notes that high search volume does not necessarily lead to conversions and usually attracts more competition, making rankings harder to secure.

On Warrior Forum, LucidWebMarketing shared an example involving an equipment website: visitors arrived by searching for the name of software used by the equipment, but they might have been interested only in the software, with no need to buy the equipment. This is one practitioner’s experience, not something that happens to every website, but it illustrates that the keywords bringing in the most traffic are not necessarily the most commercially valuable.

Technical and on-page SEO: content must also be accessible and usable

Technical SEO addresses how search engines crawl, understand, and index a website. In a 2023 introductory article, yesharris noted that focusing solely on ranking factors is not enough if crawlers cannot access the website’s content. This does not mean that fixing technical issues guarantees rankings; rather, it means the question of whether content can be seen cannot be skipped.

• Technical aspects: check crawling and indexing status to identify barriers to accessing content.
• On-page aspects: review whether the content, copy, and page layout address searchers’ needs.
• Usability aspects: examine website performance alongside user behavior, rather than merely confirming that pages are live.

External links: neither counts nor tool scores are definitive

Backlinko notes that on-page SEO, engagement, and keyword competition are worth considering alongside authority scores and the number of referring domains. A competitor’s lower score on one metric therefore does not mean it should not rank ahead of you.

Link risks also vary by context. Semrush states that there is no universal or official definition of a “toxic backlink”; the industry, website history, overall link profile, and intent must all be considered. For example, a link from a gambling website may be inappropriate for a children’s educational website but normal for a casino review website. A tool’s flag is a signal to investigate, not proof of harm.

Performance analysis: put rankings in the context of website goals

Rankings are worth tracking, but they should be interpreted alongside website goals. An awoo course description posted on PTT argues that success metrics need to be tied to website goals. An article by Da Vinci also notes that reaching the first page of search results does not guarantee orders.

In practice, organic traffic, goal conversion rates, time on site, and user behavior can be considered together to assess whether visitors match the target audience. These metrics help identify issues that warrant further investigation; a change in any one metric is not enough to establish the cause of a ranking change.