Target marketing uses researched data to find out what a person who might read a particular book is looking for. When you figure that out, you have them wired.
In a similiar way LinkedIn’s algoryithms take a job postings reequired skills and titles and finds those job applicants posted profiles for the best match..
Keywords are part of the wiring job. Keywords are one or more words used to indicate the content of your book. Metadata and keywords make your book appear when a reader looks for a specific keyword or keyword phrase online.