My blog is about house plants. There’s a particular plant I didn’t really focus on because I thought it was a bit 2016. My analytics said different, and they know more than me (about numbers, anyway).
I wrote a few extra articles about this plant and *BOOM* 150k views from google per month.
And I mean boom. I started the site in July last year (after seven years of failed blogs) and it went from 486 pageviews in December to earning full time income by July.
Pick a niche you love, but listen to your audience!