Which of the following should you include in an editorial calendar when creating a content marketing plan?

An editorial calendar is a planning tool for content creation and should include information pertinent to content production and strategy. "Top 10 ranking content pieces" is the correct answer because understanding which content performs well helps inform future content strategy and can be a valuable reference point within an editorial calendar. "Cost per click" is a metric related to paid advertising, not typically an element of an editorial calendar focused on organic content planning. "Funnel stage where the content fits into" is a crucial strategic element for content planning but is not among the given options as the best fit. "Backlinks" are an SEO metric indicating external links to content, which is a result of content promotion and quality, not a direct input for content planning within an editorial calendar.