fromEnglish Grammar Today
Contentandcontentsare nouns.
Content(uncountable)
Contentas a singular noun is uncountable. It means the ideas that are contained in a piece of writing or a film or a speech:
This film has adultcontent; it is not suitable for children.
His speech was very flowery, but it lackedcontentand was quite superficial.
Contentcan also mean the amount of a particular substance contained in something:
These hamburgers have a high fatcontent; they’re not good for you.
Contents(plural)
Thecontentsof a book is the list of chapters or articles or parts that are in the book, with the number of the page they begin on:
If you look at thecontents, you’ll see there’s a chapter on Japanese folk music.