2026

Topic clusters organise related pages around a broad central resource, often called a pillar page. The supporting pages answer narrower questions and connect through internal links where those links help the reader. Used well, this model can make a growing content library easier to plan, navigate, and maintain. A topic cluster is not an official

Parasite SEO is an industry term often used for what Google describes as site reputation abuse: publishing third-party content on a stronger host domain mainly to benefit from that domain’s existing ranking signals. The practice becomes risky when the content has little connection to the host site’s purpose, receives limited editorial oversight, or exists mainly

Subdomains can be useful for separating parts of a website, but they are not a simple SEO shortcut. Google can handle both subdomains and subdirectories, so the better choice depends on users, content ownership, technical setup, and long-term maintenance. This guide explains when a subdomain makes sense, when a subdirectory may be simpler, and which

Duplicate content in SEO describes a situation where identical or substantially similar content appears across multiple URLs, creating ranking uncertainty and splitting link equity in ways that reduce a site’s overall search visibility. Addressing this issue requires understanding both the technical sources of duplication and the specific signals, such as canonical tags, redirects, and URL

An SEO content strategy is a practical plan for deciding what to publish, who the content should help, how each page fits into the site, and how performance will be reviewed after publication. It connects search intent, keyword research, editorial quality, internal links, content structure, and ongoing audits into one repeatable workflow. The goal is

Cornerstone content refers to the pages that explain your website’s most important topics in a clear, useful, and maintainable way. These pages usually act as hubs: they introduce a broad subject, link to supporting articles, and help users understand where to go next. A good cornerstone page is not defined by word count alone. It

SEO-friendly content is content that helps readers complete a search task while giving search engines enough context to understand the page. It is not created by repeating a keyword in fixed places. It is created by matching search intent, explaining the topic clearly, using a readable structure, and adding information that is accurate, useful, and

Competitor keyword analysis is one of the most practical ways to improve an SEO strategy without guessing what to publish next. Instead of choosing topics by instinct, you compare the keywords competing pages already rank for with your own visibility, then identify where your content is missing, weak, outdated, or misaligned with search intent. The

Last reviewed: August 2026. This guide reflects current Google Search documentation and distinguishes the original meaning of Latent Semantic Indexing from the way the phrase “LSI keywords” is commonly used in SEO. “LSI keywords” is an SEO phrase that is still used in content briefs and optimisation tools, but it does not describe a modern

Keyword difficulty is an estimate of how hard it may be to rank for a specific search query. SEO tools usually calculate it by looking at signals such as backlinks to ranking pages, domain-level authority metrics, SERP competition, and the strength of current top results. The score is useful for prioritizing keywords, but it should

Search intent is the reason behind a search query. It explains what the user is trying to do: learn something, find a specific website, compare options, buy a product, solve a problem, or locate a nearby service. In SEO, understanding intent matters because a page can target the right keyword and still fail if it

Free keyword research tools can support a reliable SEO workflow when you know what each tool is actually showing. Google Search Console is useful for finding queries where your site already has visibility, Google Trends helps you understand seasonality and rising interest, Google Autocomplete can surface query predictions and wording patterns, and Google Keyword Planner

Long-tail and short-tail keywords describe different parts of search demand, but the distinction is often oversimplified. Short-tail, or head, keywords are relatively popular queries within a topic. Long-tail keywords sit further down the search-demand curve and receive fewer searches individually. They are often longer and more specific, but word count alone does not make a