While “content” and “contents” can both mean “something contained within something,” there’s usually a subtle difference in how we use these terms:

• Content is an uncountable noun. We use it when referring to the ideas or subject matter of something (e.g., the “content of a speech”).
• Contents is a plural countable noun. We use it for things in a container or for sections of a publication (e.g., book chapters in a “table of contents”).