"Page 38" typically refers to the 38th page of a paginated blog or news archive, and because the content on these pages is dynamic (it changes as new posts are added), there isn't one "official" post for it.
Artists often use "Page 38" as a milestone to show progress in a long-term project. For example, artists on Instagram use it to showcase their evolving style. Page 38
"They say page 38 is where a book really finds its voice. 📖 Here’s what’s happening in my current read: [Insert Quote]. Have you reached page 38 of anything lately?" "Page 38" typically refers to the 38th page