For an article to be optimised for SEO it requires above all an explanatory title and with the right keywords (keywords), so that it is easier to locate by a search engine. It is also good that the first paragraph contains these, and that they are repeated several times within the text, without looking repetitive.
For those who have a blog, for example, we've had the winning idea of including the same keywords in the webpage's URL. Of course we must not forget how important it is that the text itself, both from the visual point of view (subtitles, division into paragraphs, punctuation, highlighted words, bullet points, tags) as well as from the content point of view. The text has to be original, catchy
Moreover, a clear article with well-exposed content and not too long nor boring certainly attracts the interest of Internet users, guaranteeing a continuous flow to the reference site. It is also useful to enter some links into the text that can increase the quality of the article, perhaps also responding to the needs of users who may want to deepen the subject, but without weighing down the reading. Best not dwell on circumventing words that would end up losing the focal point; focus all on the subject matter of the discourse, making sure that readers do not get distracted from what you are talking about. An element not to be underestimated is the insertion of the images, which you can exploit to make the text not only lighter and more navigable, but above all more understandable and intuitive, and an intelligent choice will be to rename them with the keywords. But the strengths of the article will always remain the simplicity and authenticity.
Because, let's face it, we often read very similar texts, over and over, which are sometimes complicated because too technical. Choose a winning title, enrich the text then with an introduction that intrigues and stimulates surfers aimed at convincing and incisive conclusions ... and you will have created an article optimised for SEO.