Metadata: "data about data"
- provides information about the image file such as location, date taken, file size, and file extension, among other things
- primary purpose is to make sorting and organizing photos more efficient
PPI: number of pixels per inch of your image
- Affects print size and quality - can be heavily pixelated
- Defines the resolution of your image itself, with no bearing on the printer quality (DPI)
DPI: Dots per inch of your image
- Refers only to printer and ink used
- Generally, the higher the DPI (more ink dots/inch), the higher the overall quality of your image
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