In affiliate marketing a niche site is a small website that talks about one narrow topic only. For example a site may focus only on budget earbuds and post reviews, tips and buying guides about that single product type. An authority site is much bigger and covers many related topics like phones, laptops, audio gear and apps. Because it holds more content search engines often see it as a strong source of information. Both models can earn affiliate income when the articles answer real questions from readers. Thoughts?