There is another consideration: your client may be referring to inverted-pyramid writing. Front-load crucial data and answers in order to grab the reader quickly, to aide the reader in scanning for data, and to help gain and keep better SEO rankings.
Or in older-school, journalistic writing terms: avoid burying the lede.
In article or blog writing, it can be appropriate to use the more traditional introduction-exposition-conclusion format, which is aimed and suited to printed out out in which you reward the reader for their diligence reading through your piece by giving them the conclusion or climax at the end of building the case for it through your exposition.
Moreover, in website writing and modern technical writing, we tend to use active voice, short declarative sentences, and imperative voice for directions.
Me, I'd ask the client for clarification.