The Fantasy Maker Handbook is a workbook for creating your own fantasy world. Each page contains topics for the GM to consider about the fantasy world they would like to create, and the idea is to fill in the spaces on each page as ideas are developed. While the title says "fantasy," this is a tool that could be used for any kind of world-building, even alternate history or real-world settings in undiscovered lands. It could also be used for fleshing out sections of an existing campaign world.
There isn't much in the way of tips, suggestions, or guidance in the workbook - the direction you take is entirely up to you. This is simply a series of subject areas such as flora and fauna, weather, politics, and technology (to name a few) that you may want to consider when detailing your world.
Included in the package are blank grid and hex pages for mapping out specific areas or the entire globe, blank lined paper for taking notes, and an image file of parchment, presumably for printing out and using as a prop.