Start with the language readers use when seeking your subject, genre or solution. Compare similar titles and note the terms that describe their actual content. Choose categories that match the book rather than chasing a popular shelf where readers may not expect to find it.
Avoid repeating the same broad phrase in every keyword field. Use distinct, natural expressions that reflect audience, topic and format. Review platform rules before publishing and update metadata when the book’s positioning or reader response gives you a reason to refine it.