There are more books than you could read in a hundred years, even if that’s all you ever did. In a way, books are a commodity.
The firehose-stream of new books, both independent and traditionally published, makes individual books even harder to distinguish. Your only hope of being found is to focus relentlessly on the 1% which makes your book unique.
I’m not suggesting that you find a way to convince people that your book is unlike anything which has ever come before. If you’ve written a murder mystery, your book is 99% like every murder mystery since Poe invented the genre. If your book is a historical romance, ditto.