LSI keywords are synonyms and related words to the target keyword. Google uses them to understand context and determine whether a page is truly about the topic.
LSI keywords (Latent Semantic Indexing) are words and phrases semantically related to the main keyword. For example, for "SEO": LSI keywords are "search engine optimization", "rank on Google", "organic traffic", "backlinks", "keywords". Google does not look at keywords in isolation — it looks at context. A page with "SEO" but no LSI keywords (backlinks, keywords, ranking) is suspicious. Google concludes: "hmm, this is not really about SEO". Conversely, pages rich in LSI keywords rank better even if the main keyword's density is lower.
LSI keywords = natural context. Content rich in LSI = Google more confident about the topic. It ranks better and attracts traffic from keyword variations.
Source: Moz — LSI KeywordsKeyword research is the process of identifying the words and phrases your target audience searches for on Google, so you can create content that answers exactly those searches.
Keyword density is the percentage of target keywords out of a page's total words. Too low = weak optimization; too high = penalized keyword stuffing.
On-page SEO covers all the optimizations made directly on your site's pages — titles, headings, content, meta descriptions and URL structure.
A word stem is the root of a word from which other forms derive. Google treats variations with the same stem (article, articles, the article) as synonyms for ranking purposes.
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