What is vernacular photography?

What is vernacular photography?

Moma defines it as:
An umbrella term used to distinguish fine art photographs from those made by non-artists for a huge range of purposes, including commercial, scientific, forensic, governmental, and personal. Snapshots capturing everyday life and subjects are a major form of vernacular photography.

We like this one by Bernard Yenelouis:
Too broad to be understood as a genre per se, it can encompass anonymous snapshots, industrial photography, scientific photography, "authorless" photography, advertising, smut, as well as work that might be perceived as "other" than any of this random list. It could be understood as an oppositional photography - outside technical or artistic histories, yet, especially with the snapshot, it could also be entirely conventionalized, a manifestation of visual banalities, or an image so enigmatic that its meaning or genesis is entirely obscured. It is mistakes & failures as much as it may not be. & how we understand the images may or may not be separate from their initial intents.