Why Having a Validated Niche on Amazon Kindle Direct Publishing Matters

I'm emphasizing the significance of honing in on a validated niche on Amazon Kindle Direct Publishing (KDP).

I share that approximately 90% of my sales derive from one specific niche, underlining the time, energy, and cost-saving advantages of this strategy.

I express my intent to venture into a new niche and invite viewers to contribute their niche research methods in the comments.