There is no magic formula or one size fits to marketing only options you can use on your writing journey.
As your writing develops and changes so will your marketing strategy. At the end of the day you can only use what your budget affords.
Let's take a look at contrasting ideas that will help you market your books:
You Need to Combine Push and Pull Marketing in Your Strategy
What is push marketing?
All advertising can be classified into two broad categories: push and pull. On the one hand, push advertising aims to push products towards specific customers, while pull advertising focuses on the right people at the right time.