Julie Broad (speaker) explains why an index matters in a book: what to index (people, places, companies, inventions, concepts, synonyms), how it helps readers save time, and how it signals professionalism and credibility. She also cautions that creating a good index requires investment of time, energy, and likely money, so authors should ensure it adds clear value to their book.
Chapters
Index entries are primarily things like people, places, companies, associations, inventions, concepts, or specifically named ideas. You also have to consider synonyms or what a page or a section is really about. Ultimately, just remember why an index is important as you're going through it. Because for readers, a book index is a handy tool that helps them save time and effort by quickly finding the information they need. Having one is also a sign of professionalism and dedication to your readers. It shows that an author or publisher has put a lot of effort into organizing their content and making it accessible to their audience. Having an index in your book can increase its credibility and make it more attractive to readers and institutions. But make sure it's really a value add for your book, because it's going to be an investment of time, energy, and probably money on your part to create a good index.