Primary keywords are the sole keys or phrases that a certain page is mainly optimised for. It reflects the best keyword in relating practically to the core topic and content. When optimising a web page, we should consider one primary keyword to have it clear and relevant to both users and search engines. Also, it may use all similar associated keywords and long-tail keywords, with the primary one being the central theme that should appear in nearly all elements of the page such as title tag, meta description, heading tags, and within the body of the content. An excellent primary keyword is vital for perfect SEO. Research on keywords for a certain page, research on finding relevant ones with decent traffic levels and moderate competition. The keyword should also align with the searches made by the user and reflect clearly what information the page has.