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WP Table of Contents plugin creates a “table of contents” of your post.
A table of content can be great to keep your visitor on the site and make them understand what your article includes.
Simply, plugin scan the content and find headings according to heading tags.
After adding headings to table of content, plugin edit your post content and adding “id” attribute to heading tags.
Demo and further information: WP Table of Contents, Rastider.