Even if you are published through a traditional publisher (rather than self-publish) you’ll still need to get involved in the marketing of your book(s).
Well, if you go with a traditional publisher they will expect you to, or if you self-publish then your book will almost inevitably languish in obscurity if you don’t market it well enough.
It’s a highly competitive market, but there are things you can do to get ahead of competitors. You should find of Paul’s book Creating Your Masterpiece - A Novel Experience helpful – and especially if you want greater perspectives and more options (and more potential advantages) than the norm.
You may also find marketing tips in the forum and/or professional help in the services section.