I guess this might be true more for technical blogs, ie,. a dev blog explaining how to download a piece of software or repeat a case study discussed in the blog.
For example, I was blown away by how useful & accurate this guy's medium blog was for setting up apache.
https://medium.com/@JohnFoderaro/how-to-set-up-apache-in-mac...
(just used this for a class, I'm not pushing anything for anyone)