What not? They can include:
- study notes, taken while I learn
- guides / tips
- cheatsheets
- observations
- movie lists and other attempts to systematize
- open questions / confusions
- …
Centrally, it's not a blog. Blogs (and social media) tend to peg each post to a point in time, so that they age like milk and not like wine. That's the "stream" in The Garden and the Stream. I always saw more sense in the "garden" a.k.a. evergreen/long content, where you continually reuse, refine and extend your pages.
If there's any guiding principle, it's the notion of a slipbox as described by Book: How to Take Smart Notes, though as of [2023-11-23 Thu] I think future-me wouldn't call this a good slipbox just yet.
It may make sense to realize the notes existed before the website, they're not written for it. I write them anyway, entirely offline, and then decide that some pages can be public.