elaborated on and substantiated, in descending order of importance.
Thanks to its long use in journalism the inverted pyramid style has a number of well-established advantages:
Important information comes first, where it is more likely to be seen and remembered
This front-loading of content permits efficient scanning for information
The initial major facts establish a context for later secondary information
The structure places facts and keywords at the head of the page, where they carry more weight in search engine relevance analysis
In crowded home pages, it’s often good practice to provide only the lead and perhaps a “teaser” sentence, with the body of the article available through a “learn more” link to another page.