The "101 Lists" series is designed as seeds to help provide starting blocks for adventures.
Very little information is contained here, that's the point.
These lists are meant for GM's, but players can use them as well.
This particular 101 List is all about jobs & professions. Some, if not all of them can also be used as the basis for shops & services as well.
Each of them also has a quick story-hook, based on what they might typically need. This could be a job offer, an item they need or something else!