DPI Full Form is Dots Per Inch. This is basically used to measure printer resolution. It is also commonly used in association with other terms such as scanners, monitors, digital cameras, etc. DPI however, technically indicates Printer Dots Per Inch. This in turn, denotes the capability of the printer to produce the graphics on a printed page. If DPI is high, the text or printed image would be more refined.
For standard printers, the high resolution could be a minimum of 600. For digital printers and color printers the resolution is even higher. DPI for monitor resolution actually is PPI or Pixel Per Inch, as monitors have pixels and not dots. Though in real terms it is PPI for monitors, DPI has been used as the common representation. Similar to printers, more number of pixels give out more detailed version of the image or picture.