Forget squeezing millions from a few megahits at the top of the charts. The future of entertainment is in the millions of niche markets at the shallow end of the bitstream.~ Chris Anderson from, https://www.porchlightbooks.com/blog/changethis/2004/the-long-tail
There are certain pivotal works in any field. If your work, or your business, is online. This is a work you should read. It would be better if you read it when it came out, back in 2004. But, at least you can read it now so you understand where the idea of the “long tail” originated.