You are using 2 examples that couldn't be more different.
Digital Ocean's tutorials are often written by third party contributors, not DO staff. Those third parties are doing their own SEO by linking to their own websites, if you haven't noticed. It's a win-win for both DO and the writers.
Having set up a few DO droplets, I'll say that the documentation around their own services is less than great, and I often find myself Googling how to do this or that in DO and finding help on third party sites.
StackOverflow is like Facebook or Reddit; it's all user-generated content. SO staff don't contribute besides moderating the discussions. SO does well on SEO because it's been around for a long time, and the content is set up in a question and answer form, which is tailor made for search engines.
Digital Ocean's tutorials are often written by third party contributors, not DO staff. Those third parties are doing their own SEO by linking to their own websites, if you haven't noticed. It's a win-win for both DO and the writers.
Having set up a few DO droplets, I'll say that the documentation around their own services is less than great, and I often find myself Googling how to do this or that in DO and finding help on third party sites.
StackOverflow is like Facebook or Reddit; it's all user-generated content. SO staff don't contribute besides moderating the discussions. SO does well on SEO because it's been around for a long time, and the content is set up in a question and answer form, which is tailor made for search engines.