I think USG or user-generated content, SEO optimized title, and content that actually answers questions.
For example, if I do a quick search with the question "what is dropshipping?" these are the 3 sites that rank according to Google results (or at least, in my area, I'm from the US):
site 1,
site 2, and
site 3.
They all have something in common. When you go through SEO tools like Ahrefs or SEMrush, you'll see that all three made a significant effort in building a guestposting profile. Their titles are all directly related to the question, and the content are top-of-the-notch. The best thing I noticed though was when I was searching through content and going through forums when I was learning about dropshipping, I encountered these three same articles mentioned by the people! This is where "word-of-mouth" comes into play. These three websites are known to have a reputation with dropshipping content, hence they are mentioned organically, which, to Google, is a huge plus! Since people are talking about you, we'll push/crawl your content further for more people to see!